group of approximately 20-30 children gathered on a dirt field

group of approximately 20-30 children gathered on a dirt field. There are two adult men with them, one wearing a blue cap and a light-colored shirt, the other in a red shirt and a white vest. The children are dressed in various casual clothes. The men appear to be instructing or interacting with the children. The background consists of trees, a small building with a blue tarp, and a pile of red dirt. The atmosphere appears to be informal and possibly educational. In the background there is a horn sound of some kind, possibly an air horn.