The play of infants, toddlers, and young children will clearly affect their brain development, as well as their social, emotional, moral, and cognitive development, and the play of older children and adolescents will be an important factor in promoting the refinement and strengthening of brain capabilities. Playfulness is an advantage that human beings have in abundance and there is ample evidence of the evolutionary advantages of playfulness. It is important for adults who design and market toys, especially those with technology augmented components aware of the dynamic system issues that are relevant for brain maturation and play development. Toys must be innovative, robust, and relatively low cost and should appeal both to the children who will play with them and to the adults who will buy them. This market changes quickly and toy designers often do not have access to the most recently emerging technology.