Build four brilliant balloon-powered racers in Air Power. Children
can have rocket-propelled fun with these easy-to-assemble
creations, including a hovercraft and an original Klutz
balloon-powered rocket! The book comes with every part needed to
make the racers work; including five balloons, straws, wheels,
axles, two mouths pieces and stickers! Everything is explained with
clear building instructions and understandable scientific
explanations. Perfect for budding engineers!
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