Recommend a remote-controlled vehicle for a 5-year-old?

A requisition has been submitted to Santa for a remote-controlled vehicle. The elves are behind the times on stuff like this so I’ve been researching options on the web, but I’m getting lots of varied and mixed opinions. So I thought I’d turn to some live humans instead (that would be you).

I’m hoping for a vehicle that will move well on different indoor terrain including carpet, and that is easy to control (not too touchy). If it’s based on a vehicle from Pixar’s “Cars” that’s a bonus, but functionality is the priority.

Any suggestions?