It can be a lot of fun to play in the sun, and sunlight is important for our overall health. However, the suns ultra violate rays can cause sun burns and serious health problems. The American Academy of Pediatrics recommends covering up and staying in the shade, especially between 10am and 4pm when the suns rays are the strongest. A good sunscreen is also recommended.
Infants and babies should be kept covered up and in the shade, but a minimal amount of sunscreen of at least 15 SPF can be used.
Read more on the American Academy of Pediatrics website.