"If you're going to the beach, it needs to be approximately 1 to 2 fluid ounces, which is about the volume of a large egg," she said.
And it needs to be reapplied every two to four hours. You should also wear a hat, said Dr. Karen Parviainen, an Augusta dermatologist.
"I'm a big fan of hats for adults and kids," she said.
In fact, sun protection for young children is even more critical because of the potential risk early burns present later in life. Protective clothing, and avoiding peaks hours of 10 a.m. to 4 p.m. are also important, the doctors said.
"It's sun protection, not just sunscreen use," Dr. Christenson said.