Stock Car Smash-Up

A blue VW Beetle and a red American style pick up, all with detachable bits (wings, bumpers, doors etc.) A heavy wheel in the centre that you activated with a red notchy bit of plastic like a cable tie, and they went like the wind.

The official way to use them was to have a car per person and smack them into each other, but a quick trip down the stairs narrowly avoiding smashing the glass in the front door was just as exciting.