Ukidz UGEARS STEM Gearbox Model Kit - Creative Wooden Model Kits for Adults, Teens and Children - DIY Mechanical Science Kit for Self Assembly - Unique Educational and Engineering 3D Puzzles with App Grandmother and alchemy books

and alchemy books

Item Number: 31479

Item Number: AF2205

Item Number: 157100BM5021990

Ukidz UGEARS STEM Gearbox Model Kit - Creative Wooden Model Kits for Adults, Teens and Children - DIY Mechanical Science Kit for Self Assembly - Unique Educational and Engineering 3D Puzzles with App Grandmother and alchemy booksModel Size: 5. 1 x 3. 9 x 4. 3 in Level: Easy Number of parts: 120 Assembly Time: 2 hours Recommended Age: 8+ Package size: 8. 1 x 7. 4 x 2. 5 in Item Number: UTG0065 Dimensions: 8. 23 x 7. 36 x 2. 52 inches Weight: 0. 93 lb The Gearbox is a stylised educational model, an interactive study guide to the mechanism, only for learning its essentials and principles of working. A mechanical gearbox is a reducer that provides speed and torque conversions