QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office

This product was 'needed' for a lesson in physics in my homeschool. The kids enjoyed it, it demonstrated what it needed to demonstrate. On morning two, however, it was ridiculously tangled and I got annoyed with my kids (ages 14-9) because I had explained carefully to be easy with it. Untangled (which isnt great, but is doable). The next morning, however, my husband was the only one up, getting ready for work and heard this item clicking. The cat had discovered it, lounged out on the table beside it and figured out how to pull back the end ball and then proceeded to spend the next several minutes watching it swing until it needed to be reset. So, overall, this item pleased every member of our household, including the cat. The cat, however, did not take any responsibility for untangling the mess he made out of it.

Always loved these. This one lasted about 3 weeks but not because the product is flawed, because our son was very rough with it and got it twisted up. The product itself is just fine.

I have discovered that children cannot resist tangling the balls up. I have learned this the hard way by spending several long sessions with a good light and a magnifying glass to untangle. Now I keep mine in a less accessible location.

Great gift. I've placed it in my house beside a door, and nobody can seem to resist initiating the balls as they pass by. I've docked it a star because if you are unfortunate enough to tangle the thin plastic straings as you are removing the toy from the packaging, it is nearly impossible to untangle them.

Got this a gift for my husband for Christmas, he absolutely loves it, and so does our cat Daisy!

They’ve used cheap twine material on this product that are way too thin and does not detangle well, ours turned into a tangled mess within minutes of opening it and it was impossible to detangle and get it to work!

The wires are so tiny once it gets tangled you're screwed, but it does what it's supposed to do

I've always wanted on of these. Now in my second childhood, I got one. Now I can't ever pass it by without setting it motion. You can spend hours thinking about the physics of motion that is going on here. Good brain workout.,

Exactly as described my son loves it, lots of kids who visit play with it

calme, cà,cebtra

Marche très bien

The item delivered was much smaller than indicated, the base was only 9cm x 8,5cm and the height was only 9cm. The principle of conservation of momentum was demonstrable and so will be adequate for its purpose. However I was disappointed with the size. This needs to be amended in the product description.

عادية ومانصح فيها تشطيبها وخامتها عادية ليس المتوقع