13 year and up

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• 

  ERWEI 3D Solar System Model Crystal Ball 80mm 3.15″ Laser Engraved Hologram with Light Up Base Planet Model Science Astronomy Learning Toys Educational Gift for Kids

  $30.99
• 

  Magic Makers The Rattleback, Physics Toy, Real Metal Alloy Collector’s Edition

  $24.97
• 

  DjuiinoStar Low Temperature Stirling Engine, Educational Desktop Physics Toy, Unique Coffee Timer DLTD-304

  $39.99
• 

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

  $39.99
• 

  Sunnytech Hot Air Stirling Engine Colourful LED Single Flywheel Education Toy Electricity Power Generator M14-03-S

  $65.99
• 

  DjuiinoStar Spinning Top: Long Lasting (5-8 Minutes), with Glass Base (Diameter: 3.15″/8cm; Focal Length: -30cm; Edge Polished) and Carry Case, CNC Machined, Time Killer, EDC Desk Toy, Fancy Gift

  $49.99
• 

  Launch Innovative Products Phoebe Magnetic Poker Art Sculpture Desk Toy

  $19.99
• 

  Sunnytech Steel Balance Physics Toy Weightlifter Kinetic Art Balance Toy Balancing Decompressive Science Home Office Toy…

  $15.99 – $19.99
• 

  DjuiinoStar High Grade Stainless Steel Gyroscope (Etched ‘God Bless America’), Waste Your Time Efficiently (AVG 7″-15″; BR 32″), Spins Forever, Addictive Desk Toy, Anty-Gravity Unique Gift DST-901

  $35.99