Stand back! Genius at work! Encase your little bother in a giant soap bubble. Drop mentos into a bottle of diet soda and stand back as a geyser erupts. Launch a rocket made from a film canister. Here are 64 amazing experiments that snap, crackle, pop, ooze, crash, boom, and stink. Giant air cannons. Home-made lightning. Marshmallows on steroids. Matchbox microphones. There’s even an introduction to alchemy. (Not sure what that is? Think “medieval wizard.”) None of the experiments requires special training, and all use stuff found in the kitchen or in the garden shed. You’d be irresponsible not to try them. ATTENTION, PARENTS: Yes, your kids may need your help with a few experiments.