Mondo Exclusive - 2017 Never Opened Adventure Time Enamel Pin Set 5 enamel pin set. Includes Judo Air BMO, Jake, Tree Trunks, Gunter with Bonus Snail Enamel Pin. Designed by JJ Harrison "In conjuring up designs for ADVENTURE TIME pins there are certain givens. You've got to have Tree Trunks and Gunter. I grew up skateboarding and I'm so attracted to BMO's skating. It's adorable. But what trick should BMO do? A mean judo air! Finally, you need a spectator for all this cuteness and that's where Jake comes in. He can't handle it! Finish it off with a bonus snail and you got yourself a handsome set of Adventure Time pins. I hope everyone enjoys collecting them all as much as I did drawing them."- JJ Harrison