Small Size Cradle Steel Balance Ball Physics Pendulum
The set of balance balls is particularly suitable for the place such as office, desk table,computer table etc.
It is a best and useful gift for children to arouse his/her interest in physics.
Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy.
Friction and damping effects are also observed.
Pull up one ball and release,only one ball in the other side moves,pull up two,two balls will react, and so on.
When you are sleepless,just move your eyes with the bump of the ball,then you may slowly,slowly falling asleep.
Watching the bump of the ball is a special way to pass the dull hours.
Material:Solid steel ball,Nylon plumb line,ABS plastic frames and base.
Color:The base is Claret-red,the rest are Silver.
Color:As the picture
Material: Plastic and Nylon
1 x Cradle Balance Balls Desk Toy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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