HEXBUG Nano V2 Infinity Loop by Innovation First – HEXBUG at first does not seem like it would fit with a 4-year-old girl. However, let me tell you a story of how last year when our boys got the Hexbug racing set that our daughter had as much fun with it as they did. After Christmas we had to go out and find her some of her own Hexbug Nano in purple and pink so that she could race with her brothers. We would often find her playing with them by herself, the only problem that she had was remembering to turn them off. A few extra batteries solves that and this year we have the Nano V2 that can climb up the tubes. She is going to be mesmerized by her new bugs.