A former MINI owner had a garage sale so I picked this up for $10. It's a big(ger) MINI that acts as a hotwheels type race track.
I've got one as well. Grandson played with it alot when he was younger.. It's like 2 toys in one, plus it stores it's own cars inside it... Sadly mine does not have the little MINIs in it any more but has about 10 other cars..
I just pulled out the instruction page (I don't have the box). Speedeez MINI COOPER S Race City Play set. by a company called Playmates Toys Inc. Stock No. 60259 I see it was on Amazon. You can still buy additional cars on eBay.