Sunscreen recommendation?

Angella

Need some sunscreen recommendations for my son and I. He is 4 and I'm pregnant and we both have very fair skin. We apply liberally about every 45 minutes and about 20 minutes before going outside. He's very active and does alot of running. I have a kids one for his body and a special kids one for his face. He becomes so red and overheated that we can't stay outside for more than 3 hours tops. Was hoping there would be some good advice out there?