Learn about evaporation, air pressure, and how levers work-and meet some flight pioneers.Easy-to-follow instructions help kids discover how to make a giant bubble maker, a hovercraft, and a catapult.
Learn about evaporation, air pressure, and how levers work-and meet some flight pioneers.Easy-to-follow instructions help kids discover how to make a giant bubble maker, a hovercraft, and a catapult.