The Language Explosion!
Between 18 and 24 months, vocabulary explodes. Your baby learns new words every day — and "no" is the most important of all.
Development
- 20–50+ words — new words come daily
- Walks confidently and begins to run
- Climbs everywhere — chairs, stairs, anything that can be scaled
- "NO!" is the favorite word. The defiance has begun, and that is completely normal
- Pretend play: Feeds dolls, makes food in the play kitchen, "talks" on the phone
- Parallel play: Plays alongside other children, but not directly together yet
Growth
- Boys: Average 11.0 kg / 82 cm (24.3 lb / 32.3 in)
- Girls: Average 10.4 kg / 81 cm (22.9 lb / 31.9 in)
Sleep
- 11–14 hours per day (nighttime sleep 10–12 hours + 1 nap)
- One midday nap (1–2.5 hours), but some start protesting
- Consistent bedtime routines are more important than ever with a strong-willed toddler
Feeding
- 3 meals + 2 snacks — family food
- May be picky. This is normal and peaks around age 2
- Offer varied food without pressure — let your baby decide the amount
- Whole milk to drink (max 500 ml / 17 oz dairy products per day). Full-fat formula only if underweight, on doctor's advice
- Vitamin D: Continue with 400 IU (10 mcg) daily
Good to Know
- 18-month well-baby checkup: Your pediatrician will assess language, motor skills, and social development — this is a standard milestone visit recommended by the AAP
- Defiance is healthy: It's your baby's way of developing independence
- Tip: Offer choices ("Red or blue sweater?"), pick your battles, and acknowledge feelings
Activity Tip
Drawing! Give your baby large crayons and paper. The first scribbles are coming — and your baby is so proud. Great for fine motor skills and creativity.
Explore on Babysential
- Sleep Tracker — Track sleep and naps
- Milestones — Follow development
- Baby — More guides for your toddler's development
Tip: Your baby understands far more than they can say. Speak in short, clear sentences: "We're putting on shoes. Now we're going outside."