eddieandbill come running from marbles and piracies (6-8)
When you’re young, everything is sudden and everything is important. Kids don’t walk – they run. Marbles and piracies (imaginary or not) are incredibly pressing, but eddieandbill are willing to drop everything as soon as the promise of balloons is in the air.
and it's spring when the world is puddle-wonderful (8-10)
Young kids and a young year blend together seamlessly here. Spring becomes the time when young minds can label the world, creating new words like "puddle-wonderful."
and bettyandisbel come dancing from hop-scotch and jump-rope (14-15)
The repetition of youthful figures running into the poem underscores the sense that the whole world is filled with youth. It’s not just "eddieandbill." It’s "bettyandisbel," too.