Expect your child to grow about 3 in. (7.6 cm) to 5 in. (12.7 cm) and gain between 3 lb (1.4 kg) to 5 lb (2.3 kg) .
Your child will begin to recall prior events, understand symbols, imitate, imagine, and pretend.
Emotional & Social Development
Toddlers form strong emotional attachments and often experience anxiety when separated from loved ones. As this anxiety fades, the toddler typically develops strong feelings of independence mixed with an intense need for reassurance.
At 15 to 18 months, a typical toddler understands 10 times more than he or she is able to put into words. Gradually, more words form, and by 24 months a typical toddler has a 50- to 100-word vocabulary. However, normal language development can vary widely between individual children.
Sensory & Motor Development
Changes in the brain make it possible for the toddler to gain the control and coordination necessary to become a steady walker. Climbing, running, and jumping soon follow.