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Wooden Catapult DIY Kit...
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Electromagnetic Art Perpetual Motion Machine Upgraded Silent Rolling Ball Perpetual Motion Simulator Physical Science Teaching T
$13.58
$5.30Save 61%
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- Fun Perpetual Motion Simulator: This science educational toy for kids perfectly combines the laws of gravity and electromagnetic induction. The invisible mysterious power can stimulate children's curiosity to explore the mysteries of physical science. Continuously looping metal ball helps reduce stress in anxious adults.
- Electromagnetic Drive: The invisible electromagnetic auxiliary power replaces the old motor drive with loud noise and unstable function. The advantages of the upgraded version are noise-free, stable function, with invisible induction switch.
- USB Charging: Hidden USB charging interface, equipped with USB charging cable (charging plug not included). The perpetual motion desk toy can be used continuously for about 3 hours after fully charged.
- Without Assembly: Our perpetual motion devices are rigorously tested for orbital precision at the factory. You don't need to assemble and adjust the track of the metal ball additionally. One-touch switch, put in the metal ball, convenient and quick.
- Use Tips: Touch the sensor switch with your finger before use, and then put the metal balls from the top plate, the ball cannot be put in from other positions. In order to prevent multiple metal balls from colliding with each other, only one is placed at a time, and no more than two at most.
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