Klutz- The Captain Underpants Super-Silly Sticker Studio

Build Four Brilliant Balloon-Powered Racers In Air Power. ChildrenCan Have Rocket-Propelled Fun With These Easy-To-Assemble Creations,Including A Hovercraft And An Original Klutz Balloon-PoweredRocket! The Book Comes With Every Part Needed To Make The RacersWork; Including Five Balloons, Straws, Wheels, Axles, Two MouthsPieces And Stickers! Everything Is Explained With Clear BuildingInstructions And Understandable Scientific Explanations. PerfectFor Budding Engineers!