Each of these pictures demonstrates developmental changes in infants and toddlers. Pictures 1-6 shows a child from 0-3 months motor development skills as he/she raises his head and chest while lying on his stomach; supports his/her upper body with his/her arms when lying on stomach; and reaches and grasps for things with both hands. However, a child between 8-12 months shows motor skill development when they take their first steps, assisted; pull themselves up to stand; walk two or three steps without support; and finger-feeds him/herself.
Alternately, pictures 6 shows that a toddler- aged child will be observing how people react to other people, including how the grown-ups around him respond to his needs. He/she will mimic behaviors. He/she will also recognize how similar shaped objects react in similar ways. He/she will also form attachments to caregivers that may result in crying and separation anxiety.