9-in-1 Science Kit

  1. Crank and Rocker Mechanism
  2. Double-rocker Mechanism
  3. Generator
  4. Meshing Belt Driving Mechanism
  5. Music Robot
  6. Oscillating and Reciprocating Mechanism
  7. Slider-crank Mechanism
  8. Ultrasonic Guitar
  9. Ultrasonic Radar

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