Size:Without Base Features: Principle: Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy. Material: Balance Balls Desk Toy * 1, Stainless steel frame and balls, Nylon threadAttention: Friction and damping effects are inevitablePioneering developments for several years, BOJIN have been focusing on the exquisite technologies and physics tools. This classic desktop toy provides you many benefits and entertainments, is suitable for various locations such as house or office, and is an intriguing device that not only demonstrates pendulum motion, but also helps to show the laws of Conservation of Momentum and Energy. Whether you are studying physics knowledge, working on complex analysis, or looking for a delicate gift, this Garget is definitely what you really want. A Brief HistoryNewton's cradle, named after Sir Isaac Newton, is a device that demonstrates three main physics principles: conservation of energy, conservation of momentum and friction via a series of swinging spheres. Most people think that Isaac Newton invented the apparatus commonly called a Newton's Cradle, but he didn't. English actor Simon Preble invented the device in 1967 and named it in honor of Newton. In 1968 the first portable version hit the market and quickly gained popularity around the world as a fun, educational physics demonstrator. 
E**G
Good product
Bought this for my niece who loves it.Its certainly the real deal!I had concerns about the size but it's slimmer and lighter than I thought it would be. quality is also better than expected.it looks great.
F**H
very useful
Love this was a gift for my dad,it stay clean its well made and looks fab.Great gift as well as being practical. It is a lovely, clever wee item and a great gift if looking for something different.He really loved.
A**N
Excellent device
Fast delivery, cool product.a remarkable device for the price, incredible value.more than worth the slightly higher price for many users.and I couldn't be happier with it,and very happy. Thanks!
F**H
Fun gift.
Got for dad, nice little piece might get another for myself.I think it's great.As expected. Fairly good quality. Quick delivery. Well packaged.What the receiver thinks I've yet to find out.
F**H
present for my nephew
Bought as a cheap present for my nephew. Looks really cool,he loves it.looks handmade,because it is, so not really a negative.Arrived in time and I’m delighted with product. Thank you.
A**N
Brilliant item
Really nice design,feels good quality.I have had so many comments and people asking me where I bought it. Very lovely item. So far, I have no complaints.Happy with purchase.
F**H
My hubby loved this!!
I bought this for my hubby ages ago and he loved it on first sight. Perfect gift,Brilliant item,It's made really well.Very tactile.Great value for money.well received, thank you.
F**H
Excellent. Cheap. Useful
Ordered as a gift and will be ordering one for myself.love this gift well made,great value and a good talking point love it.here's hoping the birthday boy likes it.Very pleased.
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