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K'Nex Forces, Energy & Motion
  • $137.50 $123.75
K'Nex Energy Motion & Aeronautics
  • $179.99 $161.99
Build 50 Models Motorized
  • $59.95 $41.97
Cams & Cranks
  • $35.95 $25.17
Da Vinci - great kite
  • $19.95 $13.97
Da Vinci - mechanical butterfly
  • $19.95 $13.97
Da Vinci - Multiple Sling
  • $19.95 $13.97
Da Vinci - ship's cannon shield
  • $19.95 $13.97
Da Vinci - submarine
  • $19.95 $13.97
Gears & Worm Drives
  • $35.95 $25.17
K'NEX Simple & Compound Machines Grade 5-9
  • $59.99 $53.99
Leonardo da Vinci - Aerial Screw
  • $19.95 $13.97
Leonardo da Vinci - Catapult
  • $19.95 $13.97
Leonardo da Vinci - Paddleboat
  • $19.95 $13.97
Leonardo da Vinci - Self-Propelled Cart
  • $19.95 $13.97
Master Technology Educational Software (6 PC licences)    Limited Qty
  • $39.95 $27.97
Master Technology Set in Tub                                      Limited Qty
  • $151.95 $106.37
Pulley Drives
  • $35.95 $25.17
Solar Powered Butterfly                      Limited Qty
  • $19.95 $13.97
Wheels, Axels, & Inclined Planes
  • $35.95 $25.17