Airplane Car

My little invention where I put a little fast charge prop motor from a cheap little rc plane and taped it to my sons toy truck. Then I taped a 9 volt battery on the back and touched one wire to the positive and one to the negative. And believe it or not, this little sucker would go for as long as the 9 volt held a charge, which would be probably 3 or 4 days. The little motor would probably burn out before the battery gave up though.