attach the switch to an electric fuse attached to some firecrackers. Hide them under a bag and tell your friend to go turn the wiper on.
That's an irresponsible statement. Hope you never own a boat.
(OK I spoke too quick. If you are 12 years old maybe you should get a pass if your parents promise to discipline you)
I live in Wisconsin and I have a boat but not a car! I am 13 years old, own my own boat (12' mirr, the one in my photo), currently own two Evinrude, a 3HP 1966(for sale), and a 6HP 1971(in use). I do all the maintenance myself and recently mounted a fishfinder. We tow it with a toyota prius. Buget boating at its best!