Toddlers may reach out to feel each other's hair. Three-year olds figure out how to recognize boys and girls. Preschoolers are curious, too. Eye shape and color is of great interest. Unfamiliar languages puzzle them.
Preschoolers also notice that people have different physical and mental abilities.
Children often make comments that embarrass us. By age 4, children are very much tuned in to our attitudes. They sense how we feel about them and other people. Many children grow up feeling good about who they are. Most children feel comfortable being around other people, too.