DjuiinoStarHeavy Duty Gyroscope (Solid Metal Rotor): Sturdy and Stable (Provides Good Gaming Experience)! High-End Office Toy, Addictive Science Gear DG-5PRO-06

DjuiinoStar Heavy Duty Gyroscope (Solid Metal Rotor): Sturdy and Stable (Provides Good Gaming Experience)! High-End Office Toy, Addictive Science Gear DG-5PRO-06

DjuiinoStar Heavy Duty Gyroscope (Solid Stainless Steel Rotor): Initial Speed 8,000 RPM, Sturdy and Stable; Provides Very Good Gaming Experience; High-End Office Toy, Addictive Science Gear DG-5PRO-01

Sunnytech Low Temperature Stirling Engine Motor Steam Heat Education Model Toy Kit (LT001)