I bought myself a couple of those miniature RC Cars you can buy for a couple of dollars.

You can order them in different colors and frequencies, the cars in the photo use 27Mhz, 35Mhz, 40Mhz and 49Mhz.
If you want to race against each other in de living room you need different frequencies..
The Remote has 4 buttons (left, right, forward, backward) and uses 2 AA batteries. The Car has a rechargeable battery build in and you have to charge it with a connector from the batteries of the remote. The car charges in about 5-8 minutes and gives you a driving time of about 10 minutes so that is not too bad.
The cars are build quit good, after falling down from the table they still run if nothing happened. The only down side of these cars is that some of them are turning faster to the left than to the right. A nice touch is that when moving forward the head lights turn on and when moving reverse the tail light turn on.
Conclusion:
- These cars are worth the couple of dollars you pay for it
- You can have a lot of indoor fun