One of Noah's favorite things to do is race his cars off our coffee table. Step one: get them all lined up neatly in a row.
Step two: start at the end and launch them one after the other off the table.
I'm not sure why he thinks this is so much fun, but he really gets into it. He'll send them all flying, then line them up and do it again. As long as it keeps him entertained and nothing gets broken, I'm okay with letting the race go on.