This is a simple warm up to get children to develop their pace and ability to change direction. It also develops friendly competition.This warm up is ideal for children in groups of around 12 people. Ask the group to line up in the middle of the playground. Then point out two lines at either end of the the playground or use cones to mark out two lines. Number each line 1 or 2. Then when you call out a number the group must run up to the marker and then back again. The last person to make it to the marker and back is out. Continue, until one person is left. To keep the children who are out active you could introduce a forfeit, such as the children have to run once around the playground before watching.