Baby skin is more sensitive, so sunscreens marketed for them are typically mineral based, as they are less irritating," says Teng. "As children get older, they may tolerate chemical blockers, so you will see more chemical sunscreens with water-resistant claims and higher SPFs."
She says that the FDA doesn't recommend sunscreen for babies under 6 months of age. "Children at this age should be protected with shade and protective clothing."