Baby week by week · 21–24 months · 21–22 months: social practice

Your baby at 92 weeks

From Brittany Ryan, Founder and Mom of Two

What’s happening at about 21 months

Your toddler may watch other children closely and play beside them more than with them. Sharing and waiting are still emerging skills that require adult support. A child can develop quickly in one area while taking more time in another.

What’s ahead

Imitation with peers and short cooperative moments may appear. Bring questions or any loss of skills to your child's healthcare professional.

A memory to keep this week

A favorite parallel-play activity

Safety first

Use close adult supervision. Check every item for choking, strangulation, tip-over, water and fall hazards. Keep button batteries, magnets, medicines and household chemicals locked away.

In the app this week

Try this together: Roll to a friend, plus this week's memory prompts, a private journal and your Journey, quick logs for firsts like played beside a friend and rolled a ball to someone. One simple idea at a time, never 47.

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Guided by: CDC milestones + AAP (HealthyChildren.org) + CPSC, written in Brittany's words.

Every pregnancy and every baby is different. This is general, educational information, not medical advice. If something worries you, check with your provider or pediatrician.

Meet our founder

Brittany Ryan

Founder and Mom of Two

Brittany is a mom of two with a background in early childhood development. Little by Little Together began with a beautiful, blank baby book. Like so many parents, she bought baby books with every intention of filling them; instead, they sat in a closet while life kept moving. So she built a personal assistant for parenthood that tells you what matters right now, offers one simple idea at a time, and keeps your story safe.

“You don’t have to remember everything at once. Little by little, there is a story worth keeping.”

Read Brittany's story

Founding 500 · applications open until Mother's Day 2027

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