YOUNG CHILDREN  |  VOL. 71 NO. 5     Sandra Petersen and Emily J. Adams, with Linda Gillespie Reaching for a toy, 3-month-old Lucia surprises herself by rolling over. An hour later, she is still practicing. Sitting securely at 9 months, DeShawn is using both hands together to hold, bang, and toss small toys. He shifts his weight [...]