This fun toy is suitable for children to learn and understand Newton’s laws of motion while playing with. It is also a great desk toy and a mind-relaxing tool when you’re exhausted from work. It is a perfect decoration whether in the office or at home. It is suitable for adults and children for learning science, passing boring time, and releasing stress. There is no doubt that this is a good gift for birthdays and holidays, which is easy-to-install, funny and educational. It has stainless steel parallel frame cooperating with flexible nylon thread forms a durable frame. Stainless steel metal balls have better drape and force. The base keeps the ball stable as it swings.