After seeing the ad for these for 2-3 years, I decided to buy 2 of them for kids, thinking they'd be able to race them. Not a good idea, as they both work on the same frequency and can not in fact use them in the same place at the same time independently. Additionally, they don't charge simply and they lose their charges quickly. This was NOT a solid purchase and we were all quite disappointed. In hindsight, I can't believe this toy won awards!