Features: 

1.【Kinetic Art, Electronic Perpetual Motion】Very good children's science educational toys, improve children's ability to explore scientific mysteries.Perpetual motion machine for adult stress reliever. I could keep watching it forever. It’s a neat focal point to release stress after a busy day of working.

2.【Perfect Design】Perpetual motion machines are made of high-quality plastic，Use dynamics to allow the ball to loop over it indefinitely. Amaze your friends and make them scratch their heads with this clever toys. Every one will love it.

3.【MULTIPLE PURPOSES】It’s a classic desk accessory is art-in-motion. This cool desk toy will be a good icebreaker when you lay it in your office desk or your home desk. Use it to waste time, relieve stress, tune out boring coworkers, or schooling youngsters in physics. It will be nice desk toy. Good representation of torque and center of mass. It’s not only demonstrates pendulum motion, but also helps to show the laws of conservation of momentum and energy.

4.Wood color(Built-in battery Wireless version)：Built-in 18650 lithium battery, the product comes with a charging port, it takes about six or seven hours to fully charge, and the product can be used for four hours after being fully charged.

Specification:

Style: Wood color (Built-in battery Wireless version)

Size：as shown

Package Included:

Wood color (Built-in battery Wireless version):1pcs*1*Electronic Perpetual Motion(Built-in battery Wireless version), 5*steel ball,1*USB充电线.

Note:

Please allow 0.5-1cm error due to manual measurement. pls make sure you do not mind before you bid.

Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!