1.Exquisite workmanship: black well finished wooden housing, quiet and generous, metal frame, robust and durable, each metal ball that can swing for a long time2. swing time: the heavier the weight of the ball, the more friction between the ball can be reduced, the longer the swing time, the total weight of the balls is about 100 g, which can swing for a long time3.Easy installation: simply place the frame in the hole of the wooden box, then the installation is complete, the dimension of the finished production is about 9*7.5*9cm (L x W x H)4.Multipurpose items: Due to their different fun playing style, all children are very easily dressed by Newton's cradle, a nice gift for her; and as a desk decoration, it can help you release a lot of pressure when you see the swivel ball5.No mess with tangled strings Unlike the competition, everything is neatly packed and secured to ensure the strings get tangled upon arrival