I won Blockbusters Donkey Kong tournament for the SNES when I was 6. Got a champions card that gave me one free video game rental every other week for a year. I won at two stores and my brother won in 3 stores in his age bracket. So we constantly had free new games to play. That was the best year ever.
Maybe fun fact: Dr. Disrepect's "Two Time Champion" claim is from these blockbuster tournaments.