Use the power to make the ball loop indefinitely. Surprise your friends with this Perpetual Motion Marble Machine and leave them scratching their heads. Everyone will love it.
Perpetual Motion Desk Toy: The technology and design behind it is quite complex. It takes a lot of time to build and test accurately. Amaze your friends and make them scratch their heads with this clever toy.
Stress Relief: A classic tabletop accessory, this action toy is a dynamic art. Use it to k ill time, relieve stress, summon bored colleagues or teach young people about physics.
Wide Application: Beautiful decoration, can be placed at home, school or office, vintage furniture size is perfect for hanging or placing in different places like bedroom, office, etc.
Perfect Gift: This gravity toy is fun and practical. This action toy also makes a great gift for many events, such as housewarming, birthday gifts, Valentine's Day, Father's Day, and more. We can send it to our friends, kids, family.
Note: the can bounce style need one AA Battery (NOT Included)
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