That travelling in a tomato line reminds me of the musician Jason Webley who converted his car into a tomato. I love it when real people live like they're in a poem.
I like how whimsical this poem is. The ending makes me think the "I" wants to dissolve into children, to have lots of children who will live on rivers and in blimps, knowing that life is a transitory thing (like his constant travelling) and growing up is learning to be a brief part of something bigger.
That's what I get from this. That and Webley driving his little tomato.