- 5/27/2025
🧪 Are you ready to spark your inner scientist? Join us for "5 Easy At Home Science Experiments" that are perfect for curious minds of all ages! 🤩 These fun and safe experiments require everyday household items and will amaze you and your family! From creating colorful volcanoes to exploring water density, these experiments are not just entertaining—they're educational too! 🔍✨ Whether you’re a parent looking for activities to do with your kids or a science enthusiast wanting to learn something new, you're in the right place. Hit that play button and let’s embark on a magical science journey together! Don't forget to LIKE & SUBSCRIBE! 🌍🔬 #ScienceExperiments #ScienceAtHome
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00:00Today we're going to do five at home experiments that are very near and dear to my heart.
00:04And for the first time ever, we're sharing the recipe for our favorite bit of chemistry called elephant's toothpaste.
00:11We've got some epic science lined up, and the coolest thing is that all of them can be easily done at home yourself.
00:18Whoa, whoa, Bob, whoa.
00:20First up is my childhood favorite, the egg in a bottle experiment.
00:24All right, science Bob Flugfelder.
00:26I did this at the science fair when I was in first grade.
00:29The main reason I liked it is because it involved fire.
00:32And I was allowed to light things on fire.
00:34I'm impressed.
00:35The ingredients for this experiment are very simple.
00:37We have an egg that's peeled, hard-boiled, just like a standard milk bottle you could order off the internet.
00:43The neck size is very important, though.
00:44You want it to be just smaller than an egg.
00:47How do you get the egg into this jar?
00:49Because as you can see, it can't really work.
00:52It breaks the egg.
00:53That could have been a mistake.
00:54There we go.
00:55How do you get an egg into this jar without breaking the egg and making a mess like this?
01:00What's the secret?
01:01The secret, Bob, is fire.
01:03First off, goggle up for safety.
01:05I'm going to grab these papers with tongs.
01:07I'm going to light the paper, put it in the jar, put the egg on top.
01:14Look at that.
01:15A fully intact, non-broken egg is now inside this jar.
01:19When air heats up, the molecules want to stretch out.
01:22They're moving around a lot.
01:23So when we light that fire, the air inside, ooh, it wants to stretch out.
01:27But as the flame goes out, that air starts to cool down.
01:30And all the air molecules kind of suck back together.
01:32And it just pulls the egg right back into the jar.
01:35So now the question is, Bob, how do we get this out?
01:37So you have to go from a vacuum to pressure.
01:39We just blow into this jar, huh?
01:41Whoa.
01:43And there's our egg.
01:44We should add a variable.
01:45A variable is something that you change.
01:47We have a little water balloon.
01:48Because that's significantly bigger than the opening.
01:50Again, if you're using fire, adult supervision is definitely required.
01:54Okay, that should get nice and hot.
02:00Woohoo!
02:05Now your challenge is to get that out, Bob.
02:08Oh my gosh.
02:09That's all we get.
02:10I say we got one bigger.
02:11Okay.
02:12There we go.
02:12There it is.
02:13There's the blub blub.
02:14Oh boy.
02:16Oh boy.
02:17Come on.
02:18It's cooling.
02:19Wow.
02:20Man, we're getting so close.
02:21And we can't push it in either.
02:22No.
02:23We'll try.
02:24Wait.
02:25Well, can we?
02:26Oh.
02:31That's even cooler.
02:33So that shows you just how much this air shrinks and expands when it gets hot, right?
02:38It's a good start, Bob.
02:39Next up is Bob's favorite experiment, slime.
02:41And here's why.
02:42Here is a picture of me at seven years old making my first ever batch of slime.
02:46That is my evil scientist face.
02:49A lot of people know how to make slime.
02:51Yeah.
02:51There's this old craft glue.
02:53The secret of this is a chemical called polyvinyl alcohol.
02:56Now I add just a little touch of water.
02:58We're just going to thin that down a little bit.
02:59Let's mix that up.
03:00So this is still obviously very watery.
03:02The next I've got borax.
03:04And borax you'd actually find in the cleaning aisle.
03:06I'm going to take a teaspoon, five milliliters.
03:08And then we're going to add about a half a cup of water.
03:10Nice thing about slime, everyone's slime's a little bit different, right?
03:14That's cool.
03:14Now we've got glue and water, borax and water.
03:17Also important, you want to add your color now.
03:19I'm going jello pool, right, Bob?
03:21I love the jello pool.
03:23How much of that should I do?
03:24Not too much.
03:25Why?
03:25It's going to get on your hands.
03:26Your hands will be red for the rest of the video.
03:28So you want to add it to your glue solution.
03:30Two drops?
03:31Yeah, let's start off two.
03:32I'm doing three, don't tell Bob.
03:34I heard that.
03:35Whoa, you're looking cool.
03:36I'm very happy with that.
03:37There are molecules in here and they're all loose.
03:40The borax is going to bond all those together.
03:42You want to just kind of experiment here.
03:44I'm going to take maybe a teaspoon of this and you can see right away, look.
03:47Whoa.
03:49I'm doing three?
03:49Whatever you want.
03:51I'm doing four, don't tell Bob.
03:52Okay, but mine's like kind of goopy and runny.
03:54That means that you still don't have a lot of bonds that have bonded.
03:57So you add a little more borax.
03:59You need more bonding.
03:59This is a bonding activity.
04:01Whoa.
04:01So if you let it sit for just a little bit of time, it makes a difference, right?
04:05It does.
04:06I like how it doesn't like get on your hands.
04:08It seems like it would be sticky, but it's not.
04:10What if I were to add color now?
04:12It would be very hard to mix in, right?
04:13Because all those bonds are made.
04:14Give it a try.
04:15My hypothesis is that Mark's hands are going to be blue the rest of the video.
04:19Uh-oh.
04:20It might be blue the rest of the week.
04:22That is cool.
04:23It looks like a blue heart.
04:27I get why slime is so popular.
04:29Yeah.
04:30And I'm going to go wash my hands.
04:32For at-home science experiment number three, we've got a fun one that's pretty simple.
04:36You just take a very clean plate and just put a nice little layer of water.
04:41Have you ever seen those water spiders that like glide on top of the water?
04:45The question is like, why does it float on the water?
04:48Why does it just sink?
04:49I'm going to demonstrate that a little bit while I just pour a lot of pepper.
04:52It's on the surface.
04:53It's like one of those water spiders.
04:55Okay, then you just take a little bit of this blue stuff we like to call dish soap.
04:59Put a wee bit of it on your finger like so.
05:01Put it wherever you want.
05:02I'm going to go right in the center.
05:04I'm a magician.
05:06I am a powerful wizard.
05:08Pepperous.
05:09Repelicus.
05:11Whoa.
05:13You're a wizard, Bobby.
05:15What's happening here is dish soap has this special ability.
05:19It's called a surfacant.
05:20Surface tension is all the top layer of molecules in the water
05:23that are all joining arms.
05:25They're hanging together.
05:26Well, soap has this special ability to break those.
05:29As soon as you put soap, it rips that apart.
05:32And then almost like a rubber band, they all go to the side.
05:35And this is why dish soap is so good at cleaning things.
05:38That's what I love about science.
05:40It's like magic, but it's actually real.
05:42For experiment number four, it's super easy.
05:44For this, you need a clear glass and...
05:47Uh-oh.
05:48Whoa.
05:48Whoa, Bob.
05:49Whoa.
05:50So this is seltzer water.
05:51Put a couple of raisins in here.
05:53And you see how immediately we've got bubbles released, right?
05:56All right, now put some of these popcorn kernels.
05:58So far, Bob, I'm not going to lie.
05:59This is kind of a boring...
06:00It's kind of lame.
06:01I get it.
06:02Now, we have our dancing popcorn.
06:04They float.
06:05Okay, they float.
06:06A dent.
06:07Wait, what?
06:08What is going on?
06:09So clearly, the bubbles that nucleate on it from the carbon dioxide,
06:13that's like arm floaties that are going to float you to the top.
06:16And then when it gets exposed to the air, the arm floaties get popped.
06:19They sink.
06:19They get more arm floaties.
06:21They go to the top.
06:21So I figured, let's add a variable.
06:23Let's do it in some color, right?
06:24I think there's no way a corn kernel will go all the way to the bottom.
06:27Okay, I'm dumping all these in with my blue hands,
06:30which someone didn't warn me about.
06:32Whoa!
06:33It's like a race to the top.
06:34Oh, okay, halfway.
06:36Three quarters.
06:37Oh, go.
06:39Yeah!
06:40We hit the bottom.
06:41This is actually way more impressive in a tall cylinder.
06:45This is like a corn lava lamp.
06:48Get out of here, Bob.
06:49I don't know if it's going to work.
06:50I haven't tried this.
06:51My hypothesis is that we're going to get one that goes all the way down.
06:54I don't think that.
06:55Go, go, go, go, go, go, go.
06:58No.
06:59No!
07:00Come on, you got this.
07:01Oh, go, go, go!
07:04No!
07:05We're getting closer, dude.
07:07We're getting closer.
07:08Oh!
07:08Yes!
07:10This is what experimentation and science looks and feels like, you guys.
07:13We're just thinking of these things on the fly.
07:15We're curious.
07:16We're asking questions.
07:17And we answer the questions.
07:18One question we had was which of the three containers would keep the corn moving the longest?
07:23And spoiler alert, it was the biggest one, which had the most liquid and therefore the most carbon dioxide or bubbles stored up in the water.
07:30It's time for experiment number five.
07:31Bob, what is it?
07:32Elephant's tooth paste.
07:33You guessed it.
07:35And this is an experiment, just like all these, that you should definitely be doing with a parent or some kind of adult.
07:40So let's start with our hydrogen peroxide.
07:43We're going to do six ounces.
07:44I want you to get three tablespoons of warm water.
07:47There we go.
07:48To that, we're going to add one tablespoon of the dry yeast.
07:51Okay.
07:52Now, I'm going to have you mix that up.
07:53Okay.
07:53It's a little, like, hydrophobic, meaning it doesn't mix well with water unless you really try.
07:58So while we let that kind of mix a little bit, I'm going to go with a good squirt of our dish soap, maybe like a tablespoon.
08:03And finally, some color, classic red.
08:06Okay, so let's review.
08:07In here, we have our hydrogen peroxide, liquid soap, and we have our coloring.
08:11Yes.
08:12In here, we've got our yeast and warm water.
08:14Warm water.
08:15And then the last step is to mix them together.
08:17Now, this is going to act as a catalyst.
08:19It's going to speed up a reaction that's already happening.
08:21There we go.
08:22Okay, ready?
08:22Ready.
08:23Pouring, pouring, pouring, pouring.
08:25Whoa, here it comes, Bob.
08:27Woo!
08:29Wow.
08:30It's so smooth.
08:32It looks delicious.
08:32Very laminar.
08:33Oh, that's so beautiful.
08:35Whenever I smell this, it brings back so many fond memories.
08:41Hey, are you?
08:42Nerd hug.
08:43Spent a lot of time with this thing.
08:45In fact, for the first elephant's toothpaste we did in the pool, we ran so many experiments
08:50trying to get the right combinations, and we just weren't getting as much volume as I
08:54wanted, so I called up Science Bob.
08:56Told me exactly what you're doing, and you weren't using warm water.
08:59It's the one variable we weren't considering.
09:01Why do you think warm water does the trick?
09:03The formula for water is H2O.
09:05Right, so here's my little model.
09:07So this is your H, and that's your two O's?
09:09Right, so you got H2O.
09:10Got it.
09:10With hydrogen peroxide, it's H2O2.
09:13Mmm.
09:14And so we had a catalyst, and a catalyst tears the extra O apart.
09:18It hugs up with one of the other O's that pulled apart, and now we've got oxygen and water.
09:24This is why you want the right amount of catalysts to pull these off.
09:27If you don't have enough, maybe only half of the hydrogen peroxide molecules get ripped
09:31off like this, right?
09:32So many experiments.
09:33All right, so that was the at-home version.
09:34That's right.
09:35Now this is 30%, which is why we have got our goggles on, we have got our gloves on.
09:40And for the first time ever, I'll say why Bob pours this in.
09:43In the video description, we are putting the recipe for this version of elephant toothpaste.
09:48The trick is, you gotta do it with a science teacher, because only a science teacher will
09:52be able to get this 30% hydrogen peroxide.
09:54Plus, it is more dangerous, so...
09:56Don't want to do it in your kitchen.
09:57Or your bedroom.
09:58What in the world?
10:01That's my office!
10:04Okay, great.
10:05Three tablespoons.
10:06Now we have soapy hydrogen peroxide.
10:08In honor of LVD Space 3.0, I say we do green.
10:12I believe that got us a Guinness World Record.
10:14And now, our catalyst is no longer yeast.
10:17Yes.
10:18We're using a chemical called potassium iodide.
10:20Your science teacher will get easy access to it.
10:22We saw the home version, let's do the television version.
10:25Television version, here we go.
10:26I'm gonna give you the honors.
10:29There it is.
10:29And you step back.
10:31Woo!
10:36We had discussed moving it away from this game's throw.
10:40Here we go.
10:41Uh-oh, Bob.
10:41Here comes the big one.
10:42It is definitely warm.
10:44Yeah, so this is an exothermic reaction, which means it gives off heat.
10:48Definitely don't want to touch this phone.
10:49Yeah.
10:50And you also notice that it's got these brown highlights.
10:52Yeah, what's up with that?
10:52So that's the iodine from the potassium iodide, which is brown.
10:56Let's add one more variable just to see what happens.
10:58Okay.
10:59Version three, again, we're just adding a variable.
11:01And ideally, you just change one variable.
11:04In science, the reason you change just one variable is now if the result is different,
11:07you know it's because of that variable.
11:09If you change three at a time, the result will be different.
11:11You don't know which caused it.
11:13If this looks different, we know it's because of the container.
11:15We are using glued food coloring because we haven't used glue yet.
11:18Same catalyst, same amount.
11:20And it goes.
11:22Oh!
11:22Oh!
11:22Oh!
11:27Oh!
11:27Oh!
11:29Wow!
11:29I was not expecting that.
11:31Wow!
11:32It just plopped out, Bob.
11:34And a lovely blue coloring.
11:36We got our gloves on, but it's still hot.
11:38I can feel the heat on that.
11:40It was, ooh, yeah, that's really warm.
11:42Even through the gloves, you can feel the warmth.
11:44So even if you do a home version, find a variable and experiment.
11:47And change it and get it to look as cool as possible.
11:50The most important words in science aren't eureka.
11:53It's, that's interesting.
11:54Because you do stuff, you're like, whoa, I wasn't expecting that.
11:57So let us know in the comments what experiments you want to see us do next.
12:00If you try them yourself, of course, tag us on our socials at Crunch Labs.
12:04We'll catch you next time right here at Crunch Labs.
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12:08We'll catch you next time right here at Crunch Labs.
12:09We'll catch you next time right here at Crunch Labs.
12:10We'll catch you next time right here at Crunch Labs.
12:11We'll catch you next time right here at Crunch Labs.
12:12We'll catch you next time right here at Crunch Labs.
12:13We'll catch you next time right here at Crunch Labs.
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12:18We'll catch you next time right here at Crunch Labs.
12:19We'll catch you next time right here at Crunch Labs.
12:20We'll catch you next time right here at Crunch Labs.
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