6Chapter 6: The Balloon-Powered Car Race
19Chapter 19: The Incredible Paper Roller Coaster
7Chapter 7: The Fantastic Marshmallow Catapult
20Chapter 20: The Wind-Powered Boat Challenge
8Chapter 8: The Floating Paper Helicopter Challenge
21Chapter 21: The DIY Sky Glider Challenge
9Chapter 9: The Great DIY Boat Regatta
22Chapter 22: The Creative Circuitry Challenge
10Chapter 10: The Balloon-Powered Car Challenge
23Chapter 23: The Mystery of the Mechanical Marble Maze
11Chapter 11: The Spaghetti Tower Challenge
24Chapter 24: The Fantastic Fizzing Rocket
12Chapter 12: The Paper Airplane World Championship
25Chapter 25: The Enchanted Garden of Color
13Chapter 13: The Tower of Blocks
26THE END
