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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!
