When Carlos receives a gift of an unusual new toy and adjusts his exploratory actions to its characteristics, he is engaging in

What can a 5-year-old do that a 2-year-old cannot?

a. Hop a step or two with both feet. b. jump c. climb stairs, one foot up a stair, then the second foot to the same stair. d. hop on one foot.

Around what age do children begin to regard relational aggression as a more mature form of social manipulation than physical aggression?

A) Seven years old B) Nine or ten years old C) Eleven or twelve years old D) Fourteen years old