I have the parents apply sunscreen before the kids arrive in the morning, so that they are good to go for them morning. This saved me an extra 20 minutes getting out the door with 6 kids. They also send the sunblock so I can reapply in the afternoon as needed.

Last year we used those clip-on bug repellant fans. They worked really good, I would stick them on the back of their shirt so they wouldn't play with the (which none of them did).