SWING TIME--The balance balls continue in perpetual motion for only 15-25 seconds due to the resistance of the air and friction, but it won't influence the effect of playing although it can not reach the seamless convergence among balls in the vacuum .
More Durable & Rustless: With steel frame and 5pcs high polished smooth steel balance balls, which is more durable and easy to transfer and store more energy when collide.
Physics Education Toy: This Newton's cradle balance ball Toy is a good practice of physics in action demonstrates the principles of kinetic energy and conservation of momentum.
Cool Desk Decor: Suit for both kids and adults, excellent for killing boring time and stress release. It's not only a toy, but also a good desk decor for office or home. You will like it!
Simple Installation Just put the frame into the hole of the wood case, then will finish
When you are boring, please swing it, time goes by.
When you need to calm down, please swing it, you will be in peace.
When you are suffering from insomnia, please swing it, you will fall asleep soon.
When you want to have a break from study or work, please swing it, you will be relaxed
Size: 20*18*15.5cm (7.9x7.1x6.1 inches)
Material: Metal balls & Stainless steel f
YWJHY Newton Billiards Swing Ball Collision Ball Chaos Pendulum Creative Desktop Decoration Ornaments Gifts As show One size - B07JM7J769