Twelve or more children stand in a circle and hold hands to make a cattle stockade. One or more children stand in the middle and pretend they are cattle. The hold up their hands and try to dodge under the arms of the children in the circle.
If the cattle do get out the two children who let them out of the circle become the cattle and the game starts again.
If you like, you can let the children who were cattle at the beginning stay in the middle. If you do this, there will eventually be more cattle than there are people to make a fence, and the cattle will break out.
Taken from: Hello World. The Scout Association 1985

