Dave Bonta's short piece borrows the sing-song voice of a nursery rhyme, but the speaker is an adult talking to the women in his life, "mother" and "wife," and what he says is oddly boastful. He calls himself king in "the country of Chance," wearing a velvet cap, which sounds grand and a little silly at once. A king ruled by luck isn't really in control.
The details that follow are strange and slightly comic. He had a mine and "sealed the thing," as if shutting away something valuable or dangerous. He saves money "in trees," which cost "a song" and "keep the children company." Judging by the imagery, he may be explaining an unusual, unconventional way of providing for his family, one that trades hard cash for something living and shared.
The mood is playful, light, and a bit wry. Beneath the rhyme, though, there's a hint of anxiety: he sounds like someone reassuring his family that the odd choices he's made will turn out fine.