Swiper is the fox on the Dora the Explorer cartoon. Swiper tries to steal stuff, but if you say "Swiper NO SWIPING!" 3 times, he says "awwwww, man!" and doesn't take anything.
I've started to encourage my kids to say "awwww, man!" when they're disappointed or fail at something....and then to try again. It's been good. It's fun when I'm playing Zuma and lose a life to hear Strong Bear say "awwwww, man!" for me.
This morning, Delightful Finch started saying "aww, Ma-yan" :)