6Chapter 6: The Flying Invention
20Chapter 20: The Sustainable Water Purification Boat
7Chapter 7: Building a Musical Instrument
21Chapter 21: The Urban Vertical Farm
8Chapter 8: The Magical Garden Project
22Chapter 22: The Clean Energy-Powered Boat
9Chapter 9: The Solar-Powered Gadget
23Chapter 23: The Smart Farm Irrigation System
10Chapter 10: The Space Exploration Vehicle
24Chapter 24: The Eco-Friendly Waste-to-Energy System
11Chapter 11: The Puzzle Box
25Chapter 25: The Future of Clean Technologies
12Chapter 12: The Water Purification Project
26THE END
13Chapter 13: The Creative Recycling Challenge
27Other Available Categories
14Chapter 14: The Invention of the Future
