For young babies (under 6 months), sunscreen can be applied to small areas of the body that aren't covered by other clothing (such as the backs of the hands, tops of feet, face, and back of neck). Older babies and children can have sunscreen applied to all areas of the body (just be careful of those sensitive eyes!). If your baby has sensitive skin (and many babies do), consider a sunscreen that has zinc oxide or titanium dioxide.
Always apply sunscreen 15 to 30 minutes before going out in the sun, and make sure you rub it in well everywhere that will be exposed to the sun. There are places that often get forgotten, like the backs of the knees, tops of feet, or the ears, so make sure they don't get left out! Reapply at least every 2 hours to ensure that you are getting the protection you need.
Once your child is covered head to toe (remember, you can get a sunburn even on cloudy days), get out there and enjoy your summer!!
- Source: Fun in the Sun: Keep Your Family Safe (Copyright © 2008 American Academy of Pediatrics)