Not have children ride a two-wheeled bike until age 5 or 6. Wear a helmet yourself. Kids learn best by observing you. Never let children ride at dusk or night. This is too risky, even for adults.
Visibility is very limited.
The peak sun hours are from 10 A.M. to 2 P.M. While it would be unrealistic to avoid these hours altogether, you can apply sunscreen 15 minutes to one half hour before going out into the sun. Read labels and choose a sunscreen that protects against both UVA and UVB rays. If you plan on going in the water, choose a water-resistant sunscreen. The sun's radiation can cause painful burns that blister. Cool the burn with a cool cloth or ice wrapped in cloth.