This poem is wonderful! I can just imagine looking at the painting and thinking about what life would be like beyond the picture. The poem captures the spirit of the world beyond the painting so well. The poem doesn't rhyme, but it does have a rhythm. (It's almost blank verse, with a few deviations here and there.) Also there is quite a bit of fun alliteration which seems to almost capture the playful spirit of what goes on in the painting's wall.

Really, my only criticism is that it makes me want more. What is life actually like in that fun picture world?