This does require registering your email address with a company, but Central Park East High School is competing to win this shoe design competition by Vans, and this will quite literally revolutionize their art program if they win. Just search for "Central Park East High School" and vote for them!
https://customculture.vans.com/vote
$75,000 would completely change their program. (Though it sucks a corporation is necessary to do that...)