From the episode Mystery Train on Finn's birthday. I loved how Jake was just floating there attached to balloons, so I had to make it a necklace!
Give it to your Adventure Time loving friend for their birthday, or celebrate your own special day :)
28 in chain with a lobster claw clasp (use last picture as reference for where the necklace falls)
I do not own Adventure Time at all and am not affiliated with cartoon network in any way.