Features:

*Art: It is a fun way to learn science, perfect for kids to experience mechanical fun in classroom education or play with, improving children's ability to explore scientific mysteries. 

*Conservation of Energy: It won't last forever due to air resistance and friction. Newton's Law Art Ball can move continuously for 8-15 seconds. Good torque and centroid performances. Not only does it demonstrate pendulum motion, but it helps demonstrate the laws of conservation of momentum and energy.

*Unique Ornament: Made of plastic, suitable for table sports decoration. Surprise your friends with this clever toy and enjoy the fun of science.

*Stress Reliever: Fit for decompression in adults, it's great to release work fatigue and stress after a busy day at work, perfect for outer space science-themed classes or office decor, a great teaching tool for explaining eternal physics. Perfect for birthday, holidays, Christmas, and Father's Day gifts.

*Optional: Yellow (Plug-in model), Red (Plug-in model), Wine Red (USB charging model)

Specifications:

*Material: Plastic

*Color: Yellow (Plug-in model), Red (Plug-in model), Wine Red (USB charging model)

*Size: 150 x 100 x 150mm

*Weight: 229g, 288g

Package Included:

1 x Perpetual Motion Machine Decoration

Note:

1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.

2. Please allow slight manual measurement deviation for the data.

Payment must be completed within 5 days. If you have any problems about payment, please contact us via ebay message.

We only ship to confirmed ebay Order addresses. Please comfirm that your Order address is in line with your shipping address.

Please kindly note that the combined shipping is not provided because the shipping fee is calculated by weight. Also, the each additional item means exactly the the same color and size. 

It takes about 7-15 working days to Australia; about 10-30 working days to other countries. Transit time may be a little delayed because of the bad weather and customs inspection. If you do not receive your item within 30 working days since payment finished, please contact us immediately for further assistance.

We strive for 100% customer satisfaction! Positive Feedback is very important to us. If you have any questions, please feel free to contact us via "Ask seller a question" . We will reply your email within 24 working hours.