The Amazing Spiez S01 Ep17 - Operation: Grow Up

A library has been destroyed. Jerry sends Marc and Tony to investigate, while Lee and Megan deal with a villain destroying a museum. When Tony and Marc arrive, Tony gets hit by a beam from the villain, making him get older and taller. The spies find out that an 8-year old boy named Archibald Cranton is behind this. Tired of being a kid, he plans to destroy all the museums and libraries and turn them into playgrounds and amusement parks. The spies must take him down.

In the B-story, Tony wants to join the school choir.

Villain: Archibald Cranton (an 8 year old kid)