I just wanted to share that I used to think a little bit of sun was okay, but still used sunblock for myself and my children beyond 20 minutes of exposure.
Well, last year I had skin cancer on my forehead! Luckily they got it all but I'm not thrilled with the scar and just the anxiety I had to go through.
Now, I use sunscreen under my makeup (which also has sunscreen) I use Mary Kay, two layers of SPF 25 equals 50 and I put sunblock 50 on my daughter every day - Waterbabies; she has the same sensitive skin that I do.
When she was a toddler I got the highest block I could find in a stick that you just kind of roll-on (I think it was waterbabies).
You still get vitamins from the sun with sunblock on - so use it everyday and don't forget the backs of your hands when driving - another common place we forget and often get skin cancer (plus it will keep your hands younger looking).