when the world is puddle-wonderful (10)
As if one made-up word wasn’t enough, Cummings tosses this guy in for good measure.
it's spring (16-17)
By the time we get towards the end of the poem, the line breaks make the announcement that spring has arrived even more emphatic. Here’s the first time that we see "it’s/ spring" on two different lines, suggesting that the discussion of spring is only getting more important as our speaker continues.