Grammar check:
Your original sentence: "what grows on the head?"
Corrected: "What grows on the head?"
Even better and more natural: "What grows on your head?" This asks about someone’s own head.
Answer for a 7-year-old:
- Hair grows on your head. Hair comes from tiny pockets in your skin called hair follicles.
- Your scalp (the skin on your head) is there too. It can make oil and sometimes little flakes called dandruff.
- Sometimes little bumps (like pimples) can appear, and sometimes tiny bugs called lice can be on hair — if that happens, tell an adult so they can help.
How to keep your head healthy:
- Wash your hair with shampoo sometimes (ask an adult how often).
- Comb your hair so it looks neat.
- Eat healthy food and tell an adult if your head itches or hurts.
If you want, you can try other ways to ask the question, like: "What grows on a person’s head?" or "What grows on my head?"