My 2 year old had ended up with a sunburnt shoulder, he had suncream on and was in and out the pool, the only thing I can think of is I either didn't apply the suncream as thickly on that side as the other, or the water possibly washed it off, I feel so bad. It's not slot only some of his shoulder and arm and he isn't whingeing through discomfort or anything, I can't help but feel like a bad parent.