For the kiddo, I nearly use everything
California Baby. You don't need a lot, it's natural, it doesn't harm his skin and it smells terrific. I buy the bulk refills - gallon size jugs - and I think I break even, because the stuff lasts forever. Buying it in the store would get pricey fast.
This is a great site for judging sunscreens -
Environmental Working Group's 2010 Sunscreen Guide: Best Beach and Sport Sunscreens - and California Baby ranks high... HTH!