Got this as a gift for my son's 7th birthday. He and his friend chose it and were very excited about it. However, they were disappointed with how quickly they broke; In less than 15 minutes the tail came off and it wasn't a glowing yo-yo anymore, just a glowing spiked ball. Hence he gave 2 stars initially. Then we found that you can reset and fix the tail. "Hooray," he said, "let's change it to 5 stars!" And here it is. They can be fixed with the tip of a ballpoint pen.