It's safe to use sunscreen on infants and children. However, for babies under 6 months, it's best to keep them out of the sun instead of applying sunscreen. For kids older than 6 months, choose a kid-friendly product with broad-spectrum protection and an SPF of at least 15. Remember to reapply often, especially after swimming or sweating. Sunscreen doesn't just protect their skin now, but helps ensure healthy skin in the future too.