Anki has a pretty amazing product out on the shelves right now: the Anki Overdrive Starter Kit. This is essentially a racetrack that you construct, to race toy cars that can actually shoot one another off the track, all while using your phone as the controller. It's a smart car race track.
Don't be fooled: this isn't just for kids. This is one of those "toys" that you would buy for the kids/nieces/nephews and spend more time playing it than they would.
This kit comes with 8 different battle tracks, 2 cars, a floor charging system and a tire cleaner.