Finders Keepers/Everyone's a Critic

Lili finds a pretty ring in the sandbox and declares 'finders keepers', but after a trip to a magic palace, Lili finds out what it's like to lose something precious and decides to return the ring to its rightful owner. After Yuri gives Matt's painting some harsh criticism, he's subjected to a taste of his own medicine by a snarky fridge magnet with peculiar taste.