Answer:
(1.) From lines 1-16, we can see that the poem rhymes at the last words of each line to the last word of the third line. This rhyming causes the poem to be musical and recital in nature especially for children. It renders a pleasing effect on the poem making its recital an enjoyable experience. Moreover, it offers itself as a mnemonic device, smoothing the progress of memorization of the poem.
(2.) In lines 17-24, the write was talking about the girl that touched him and disappeared into thin air.He thus vowed to find the girl even if he gets old with wandering through hollow lands and hilly lands. He vowed to look for her where she had gone and then kiss her, and hold her hands after finding her while walking through the gardens and playing with flowers.