one of the simplest toys, a set of simple wooden blocks is also one of the best toys for developing minds. andrew witkin, director of marketing for mega brands told investor's business daily that, "they help develop hand-eye coordination, math and science skills and also let kids be creative." other toys like marbles, jackstones, and balls serve similar functions in child development, allowing children to use their minds and bodies to learn about spatial relationships, cause and effect, and a wide range of other skills.