Poem ideas for bedtime (kid friendly)

I have been saying Dorothy Parker's Lullaby for my kids at bedtime and it's become a favorite closer (my singing voice is hot garbage and my kids know it).

Since it's such a hit I thought I'd ask Reddit for more poem recommendations that would be good to send grade schoolers off to bed.

Thinking classic and/or modern, diverse, mostly positive/calming, nice flow and meter?