OK for the price point. The only trouble is that the balls are somewhat magnetic and pulling the one on the edge causes the remaining four to start oscillating immediately - they have to be held with hand/stopped before letting go the one pulled so that the desired effect is demonstrated correctly.
These ball does not have anti-magnets thats the reason I am giving 3 star, once you swing the ball it stops in a second. With does not indicate any part of balancing, it is only good for displaying without any movement.
Tiny but very cool. NOTE product is not idiotoodporny, wystarczyła niecałą minutą to Grandpa with 4 years wnukiem popsuło toy, as the bugles zaplątały, so is no longer rozplataly. For the product itself and seller I don't have any objection. All OK. Recommend.