Here are 64 amazing experiments that snap, crackle, pop, ooze, crash, boom, and stink. Giant air cannons. Homemade lightning. Marshmallows on steroids. Matchbox microphones. There’s even an introduction to alchemy. (Not sure what that is? Think “medieval wizard.”) None of these experiments requires special training, and all use stuff found in the kitchen or garden shed. You’d be irresponsible not to try them.