Most toddlers reach the big milestones (walking, first words, pretend play) within a window of several months, not on a fixed date. Toddler developmental milestones are best read as a rough map of what children usually do by a given age, not a test your child passes or fails. This guide walks through what typically happens between 12 and 36 months, gives a simple toddler development checklist by area, and explains when a conversation with your pediatrician is worthwhile.
Why milestones are a range, not a deadline
Children develop unevenly. A toddler who walks early may talk later, but progress should be followed over time, especially if a skill is missing or lost. Health organizations such as the CDC publish milestones as the age by which most children (about 75%) can do something. These checklists help identify concerns; a missing milestone is a reason to talk with your child’s doctor, rather than assume they will simply catch up. Premature babies should be assessed by corrected age, counted from their due date, until roughly age two.
Toddler development checklist by area
Movement (gross and fine motor)
- 12–18 months: pulling to stand, cruising along furniture, taking first steps, scribbling with a crayon, stacking two blocks.
- 18–24 months: walking steadily, beginning to run, kicking a ball, climbing onto low furniture, using a spoon with some spills.
- 24–36 months: jumping with both feet, climbing playground steps, turning pages one at a time, copying a vertical line, helping with simple dressing.
Language and communication
For practical activities, read our guide on how to encourage toddler speech.
- 12–18 months: a few single words (“mama,” “ball”), pointing to show you things, following simple directions like “give me the cup.”
- 18–24 months: a growing vocabulary, often 50 or more words, and early two-word phrases such as “more milk.”
- 24–36 months: short sentences of three or more words, naming familiar objects and people, being understood by caregivers most of the time.
Thinking and learning
- Around 12–18 months: finding hidden objects, copying simple actions, putting things in and out of containers.
- Around 18–24 months: sorting shapes, beginning pretend play (feeding a doll, talking on a toy phone).
- Around 24–36 months: simple puzzles, matching colours, playing make-believe with a short storyline.
Social-emotional milestones
Social-emotional milestones are often overlooked, yet they shape how a child connects with others. Here is what to look for:
- By 18 months: showing affection with hugs, separation worry when a parent leaves, handing you a book to read, and playing alongside other children.
- By 24 months: noticing when others are upset, strong opinions (the famous “no!”), copying adults and older children, and parallel play.
- By 36 months: taking turns with help, showing a wide range of emotions, beginning to name feelings, and playing simple games with other children.
Big feelings and tantrums are part of this stage because a toddler’s wants arrive well before the self-control to manage them. Explore our Parenting & Child Development section for more guidance on supporting children.
What 2-year-old milestones look like in everyday life
A typical two-year-old runs (a little clumsily), says two-word phrases, uses gestures, explores toys and scribbles, and insists on doing things alone. They also still need a lot of help with feelings. Keep noting new skills and discuss any missing milestones or concerns with your pediatrician.
How to support development at home
- Talk throughout the day. Narrate what you are doing and pause to give your child a turn.
- Read daily. Even five minutes of shared picture books builds vocabulary and attention.
- Offer safe movement. Playgrounds, stairs with supervision, dancing and ball games all build strength and balance.
- Allow simple choices. “Red cup or blue cup?” builds independence and thinking skills.
- Play together. Blocks, pretend play and messy sensory play do more for development than any app or flashcard.
When to talk to your pediatrician
If a milestone is missing, your child loses a skill, or you have any concerns, speak with your child’s doctor. Examples worth discussing include:
- No walking by 18 months, or no single words by around 16 months.
- No two-word phrases by 24 months.
- Losing a skill your child once had, such as words or social engagement. This is always worth an early appointment.
- Little eye contact, little response to their name, or no interest in other people.
- Persistent difficulty with movement, such as stiffness or consistently favouring one side.
You know your child best. If something feels off, ask, because early support can help. The American Academy of Pediatrics recommends general developmental screening at 9, 18 and 30 months, and autism screening at 18 and 24 months. Screening is also appropriate whenever a parent or clinician has a concern.
The takeaway
Toddler development is a journey with plenty of detours. Use milestones to notice and celebrate progress, keep playing and talking, and call your pediatrician when something worries you.
Disclaimer: This article is general information, not medical advice.