[Si Coe]

My eldest son is 2 1/2 and he drives (or tries to) an HPI Mini Trophy that I've deliberately slowed to a crawling pace.
Its a pretty big car, but he likes carrying it around and its tough enough to cope with him dropping it. The reason it works well is that the Mini Trophy has a full roll cage under its truck body - this means it survives toddlers sitting on it etc.

The biggest problem isn't the car though - its the transmitter. He can use a old Futaba Attack stick radio with it on a neck strap and he just holds the sticks, but his hands aren't really big enough to grip the set any other way. But its an old 27mhz set and he just breaks the antenna so thats no good.
I've tried him with a few wheel radios but his hands are far too small to go round the grip and pull the throttle trigger.

That little HBX is the same as the Tomy GX I got for my son first. Its very very fast, even the slow setting is pretty nippy and the steering isn't proportional so its quite hard to control. However what is cool is the tiny toddler hand friendly radio it comes with.