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Pros: it's beautiful, it's brilliant, is not very big but it catches the eye easily. Everyone wants to touch.
Cons: everything is in plastic or almost, the quality is poor, it should be up even, the beads are very small and should not be expected to have found the formula for perpetual motion because the motion does not exceed the 20 trips.
Other Thoughts: the strings are very thin and wrapped in polystyrene for transport
Bottomline: if you do not play with then it is surely one of the most beautiful newton pendulum as it will greatly shines despite its manufacture plastics.
Pros: It looks cute.
Cons: Number one it is not worth the price. It is made of very cheap materials. Everything is plastic except the balls. The 'wire' holding the balls is identical to fishing line- so not very sturdy. The balls are very small. About 25% smaller than a standard small marble. My balls dont actually line up very well so when they hit they go in every direction. I ended up breaking one of the strings because it was packaged so strangely. The entire unit was incased in styrofome so you had to break off little chunks to free the strings. The price certainly doesnt make the awful quality. I would put it more around 3$.
Other Thoughts: I wouldn't reccomend it.
Bottomline: Not worth it