Air Power | Pat Murphy

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!