Months 9-10

Initiates simple games (‘pat-a-cake, peek-a-boo’)^{14, 27, 41}

Responds to music by dancing⁴¹

Shows toy preference^{14, 41}

Coordination of secondary schemas (intentional, goal-directed behavior)²³

Play usually with caregivers or parents²³

Exploratory play^{23, 27}

Picks up toy deliberately in play²⁶

Sensorimotor play³¹

Enjoys toys that require visual attention^{60, 27}