Amazing Science Kits: Mega Science Box. Mega box=Mega Fun! Great for learning too! This kit shows you how to do twenty fun science experiments, each in five minutes using common household items and the contents of kit! This kit contains twenty experiment cards, chalk, a whistle, and two marbles. Recommended for ages 8 and up. WARNING: CHOKING HAZARD-Small Parts. This Toy Contains a Marble. Not for children under 3 years Imported.