Many, many, many years ago my buddy and I built a go-cart using an old lawnmower engine. We thought we were cool! Maybe got 10mph. Now...Junior Dragsters! I didn't know this existed until a TV news story the other day...interviewing a 10 yr old girl who was bragging about beating an older boy...girls rule/boys drool...running around 45 - 50mph...pretty funny.
http://jrdragster.nhra.com/apcm/templates/about.asp?articleid=1004&zoneid=70