And watch where the chalk-white arrows go (11)
Chalk is something that reminds us very much of children, and one of their favorite ways to have fun on the sidewalk: making maps and pictures and drawing hopscotch courses. Following a path drawn out in chalk would be just the way to enchant a child into imaginative exploration.
For the children, they mark, and the children, they knowThe place where the sidewalk ends (15-16)
But there are a lot of things that small children know that adults may have long forgotten – like the wonderful places an active imagination can take you. So at the end of this poem, we have to seek out a child to take us back to the land made of dreams.