I started out with the parents providing their own bottles of sunscreen but I didn't like having 5 bottles around so a few years ago I started asking the parents for $5 every May to pay for the Green Beaver organic sunscreen that I can keep in my park bag and put on all 5 of the children. I put it on their chins, cheeks, necks, arms & legs and they wear sunhats so I don't have to put it all over their faces. We also spend all our outside time from 9am to 11:30am before the UV rays are bad and we don't go back outside in the afternoon in July/Aug.