Newtons Cradle Balance Balls, Swinging Balls with Black Base, Science Physics Accessories for Adults, Calm Down Fidgets Kit, Desk Ornament for Stress Relief, Office Home Decoration (Black)

¡Me encantó! El producto llegó en perfecto estado, bien empacado y justo como se describe. Lo he estado usando todos los días y funciona de maravilla. ¡100% recomendado!

you get what u pay for. string lasted about 15 min. then 2 just fell apart. looks like they glued them on and glue is dried out and brittle. trying a more expensive one and returning this

Bought this for my daughter. Perfect size as it doesn’t take up too much space in her desk. It seems pretty durable and well constructed. My daughter has had fun with it.

Not the best newton's cradle but if you're looking for something inexpensive for your desk, it is ok. Has gotten tangled a few times and then it doesn't work as well once it has been untangled. The strings become kinked. Not the most durable.

It's nice, but the base is uneven and the base moves when you swing the balls.

Great cradle and is fun for everyone.

Fine, but 4 of the connecting strings that hold onto the plastic came detached so I can't drag a ball back without the string slipping off of the entire thing.

It works prefect and I love the packaging so that I can put it safely in the box when not in use. I used it for teaching the law of cause and effect. I have seen others that get tangled up and are hard to move from place to place. this is perfect and compact and stores nicely for travel.