Outdoor Camping Games For Kids

Does anyone know a few things to summer camp with children from 3-5 years?
I will be a summer camp counselor from the next week and has just informed me that I will work with children ages 3-5. I know some games but they are mainly for older children. Does anyone have sensors care, easy crafts, outdoor games … anything? I need ideas FAST!
Marble painting … get some shoe boxes and line the bottom with paper, then place a ball in the paint … then shake the box to make the marble roll …. Kids love it. color sand
Experience Zion National Park with iPhone App, ZionQuest