Among common milestones for 12- to 15-month-old infants:
- They say "mama" and "dada" and exclamations like "uh-oh."
- They try to say words that you say.
From cdc.gov/milestones
Babies begin to use words. This includes using the same sounds consistently to identify an object, such as "baba" for bottle or "juju" for juice. Many babies have one or two words and understand 25 or more. A baby will give you a toy if you ask for it. Even without words, a baby can ask you for something by pointing, reaching for it, or looking at it and babbling.
Tips include the following:
- You can help your child to say the words that she knows.
- You can talk about the things you use, like "cup," "juice," "doll." Give your child time to name them.
- Ask your child questions about pictures in books. Give your child time to name things in the pictures.
- Smile or clap your hands when your child names the things that he sees. Say something about it. "You see the doggie. He's sooo big! Look at his tail wag."
- Talk about what your child wants most to talk about. Give her time to tell you all about it.
- Ask about things you do each day: "Which shirt will you pick today?" "Do you want milk or juice?"
- Build on what your child says. If he says "ball," you can say, "That's your big, red ball."
- Introduce pretend play with your child's favorite doll or toy animal. Include it in your conversations and your play: "Rover wants to play too. Can he roll the ball with us?"
From zerotothree.org