This was a gift for our four year old grandson. It took a bit of effort from grandad to get the cars working together, but fun was had by all once they were working. Have to say, the cars/controls have been a little tempremental. It is not possible to just take them out of the box and use them, so it means a savvi adult has to be around everytime, to get the things working together. Other than that, it's been a successful gift and enjoyed by the lad it was bought for. We have made sure that the cars are reboxed after each use, as I don't think the plastic they are made of would stand up to too much battering. Over all, I'd say a pretty good buy though.