Finding food, water, and protection from various dangers would have great value. Concept of biophilia or prepared learning. Children are very much attracted to bodies of water.
Trees are also very attractive to kids.
Restorative effects The ability to commune with the natural environment may be literally essential for our survival. Natural environments, including human facsimiles such as parks may be essential for mental health and the stimulation of creativity. Natural environments may provide an optimal level of stimulation. They may have other effects that we do not yet understand. Recovery from surgery can be speeded when a patient's window has a view of trees.