What to know
- Learn about the developmental milestones that most children do by 15 months of age.
- See important information to share with your doctor.
- Find tips and activities you can do for your 15 month old.

Important Milestones: Your Child By Fifteen Months
How your child plays, learns, speaks, acts, and moves offers important clues about your child's development. Developmental milestones are things most children (75% or more) can do by a certain age.
Check the milestones your child has reached by 15 months by completing a checklist with CDC's free Milestone Tracker mobile app, for iOS and Android devices, using the Digital Online Checklist, or by printing the checklist below.
"Learn the Signs. Act Early." materials are not a substitute for standardized, validated developmental screening tools.
What most children do by this age:
Click the links below to view a photo or video of each milestone.
Social/Emotional Milestones
- Copies other children while playing, like taking toys out of a container when another child does
- Shows you an object she likes
- Claps when excited
- Hugs stuffed doll or other toy
- Shows you affection (hugs, cuddles, or kisses you)
Language/Communication Milestones
- Tries to say one or two words besides “mama” or “dada,” like “ba” for ball or “da” for dog
- Looks at a familiar object when you name it
- Follows directions given with both a gesture and words. For example, he gives you a toy when you hold out your hand and say, "Give me the toy."
- Points to ask for something or to get help
Cognitive Milestones (learning, thinking, problem-solving)
- Tries to use things the right way, like a phone, cup, or book
- Stacks at least two small objects, like blocks
Movement/Physical Development Milestones
Other important things to share with the doctor:
- What are some things you and your child do together?
- What are some things your child likes to do?
- Is there anything your child does or does not do that concerns you?
- Has your child lost any skills he/she once had?
- Does your child have any special healthcare needs or was he/she born prematurely?
Tips and Activities
What You Can Do for Your 15 month old

As your child's first teacher, you can help his or her learning and brain development. Try these simple tips and activities in a safe way. Talk with your child's doctor and teachers if you have questions or for more ideas on how to help your child's development.
- Help your child learn to speak. A child's early words are not complete. Repeat and add to what he says. He may say "ba" for ball and you can say "Ball, yes, that's a ball."
- Tell your child the names of objects when he points to them and wait a few seconds to see if he makes any sounds before handing it to him. If he does make a sound, acknowledge him, and repeat the name of the object. "Yes! Cup."
- Find ways to let your child help with everyday activities. Let her get her shoes to go outside, put the snacks in the bag for the park, or put the socks in the basket.
- Special acknowledgments to the subject matter experts and others who contributed to the review of data and selection of developmental milestones, especially Paul H. Lipkin, MD, Michelle M. Macias, MD, Julie F. Pajek, PhD, Judith S. Shaw, EdD, MPH, RN, Karnesha Slaughter, MPH, Jane K. Squires, PhD, Toni M. Whitaker, MD, Lisa D. Wiggins, PhD, and Jennifer M. Zubler, MD.
- Sincere gratitude to Natalia Benza, MD and José O. Rodríguez, MD, MBA for their thoughtful review of the Spanish-language translation of these milestones.