I am taking my baby to the beach in a few weeks. He will be 1 week shy of 6 months. I am not sure about using sunscreen at this age, but would think we need something for added protection while swimming (I do have a rash guard, swim trucks, hat and shade tent for on the beach). I read the best thing to use is something that sits on top of their skin rather than sinking into it that you just wash off afterward, but no clue what sunscreens offer that type of protection. Any recommendations for a good sunscreen for this age that you liked or used?