Hygiene topics to teach 6th graders?

I'm a nursing student having to teach some 6th graders topics about hygiene. Can anybody give me some suggestions. Here is what I have so far:

-hand washing
- skin care (eg. to prevent acne)
-using deodorants
-oral hygiene
-hair care/bathing/showering
- possible genital care for females (I'd have my female partner talk about this one)

We're not sure whether or not the school will let us talk about sexual stuff or STDs (and prevention) but I will find that out tomorrow.

Thanks in advance for any ideas.