Final answer:
Preschool-age children make steady progress in cognitive development and become more curious about the world.
Step-by-step explanation:
Preschool-age children make steady progress in cognitive development. They can count, name colors, and make basic decisions on their own. They are also capable of thinking symbolically and enjoy pretend play. Preschoolers have a growing curiosity and often ask 'Why?' to learn more about the world around them.