Here are three playful ways to say that sentence for a 7-year-old:

1. I'm all smooth and bare, and my skin doesn't say "ouch"!
2. I'm hairless like a shiny pebble, and my skin never gets boo-boos!
3. No furry coat for me — my bare skin is tough and doesn't feel pain!

How I made them (simple steps):

1. Use easy, kid-friendly words (like "ouch" or "boo-boos").
2. Compare to something fun or familiar (like a shiny pebble).
3. Keep the meaning the same but make the sounds playful.