Collecting listings has surprises
Description0px">a clever device that not only demonstrates a pendulum, but also shows the laws of conservation of momentum and energy.
The bumper ball is
The unique exclusive contemporary design makes it attactive and eye-catching.0px">pplicable to desk and household decoration and also can be as a birthday gift. It can be a
These swinging balls will keep you occupied for hours at work.0px">When feeling tired of studying and working, you can stir balls to hear the clinking sound to ease
Features
- Color: As shown.
- Material: ABS.
- Size: About 9x7.5x9.5 cm.
- The unique exclusive contemporary design makes it attactive and eye-catching.
- It can be applicable to desk and household decoration and also can be as a birthday gift.
- These swinging balls will keep you occupied for hours at work and when feeling tired of studying and working, you can stir balls to hear the clinking sound to ease.
- The bumper ball is a clever device that not only demonstrates a pendulum, but also shows the laws of conservation of momentum and energy.
- Used as decorative ornament for home and office or gifts for friends or someone you love.