his population. The authors believe that the quality of the physical environment has a greater effect on children than it does on adults, though it does have an effect on the adult population as well (pp. 127-128). The authors conclude that what children need in their environment for overall good health is a setting that is interesting, challenging, and malleable. They note that children also require a range of social opportunities, from solitude to broad contact with groups of heterogeneous people. They find different needs at different age levels. They note that infants in particular cannot accept large or sudden changes in stimulation, and that stimulation levels for all children should be kept moderately low. Preschoolers and elementary children require increasingly complex, responsive focal features in their environments, and the authors believe that the availability of functionally complex objects along with the freedom to explore the immediate environment promotes healthy development
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