40.  A child age 2 has reached the following milestones-
Physical- can play with a ball, touch or grab things, walk up and down stairs.
Social- plays and interacts with other children and imitates adult behavior.
Language- can say a sentence with 2-4 words and points to objects when named.
Cognitive- sorts shapes and colors and follows 2-step instructions.  
This stage would also be considered the preoperational stage under Piaget's cognitive development model.  This is the stage when children use symbols to express words, images, and ideas.  They  engage in pretend play.  They lack logical reasoning and display egocentric behavior.  They think that everyone else thinks, feels, and sees the world the way they do.