12-18 Month Toddler Guide

According to the CDC, these milestones are typically reached between 12-18 months:

Motor development

• Walks independently (most between 12-15 months)
• May begin to run (stiff, flat-footed running by 15-18 months)
• Climbs onto furniture
• Walks up steps with help
• Squats to pick up objects and stands back up
• Stacks 2-3 blocks
• Scribbles with crayons
• Turns pages of a board book (several at a time)
• Feeds self with fingers; beginning to use spoon (messy)

Sensory and cognitive

• Knows what ordinary objects are for (phone, brush, cup)
• Points to get attention or show you something
• Follows simple one-step directions ("bring me the ball")
• Shows interest in other children
• Explores objects in new ways (stacking, sorting)
• Finds hidden objects easily
• Points to body parts when named (by 18 months)

Communication and social

• Uses 3-10 words at 12-15 months; 10-50 words by 18 months
• Understands more words than can speak (50-100+ understood)
• Points to show you things or to request
• Shakes head "no" and nods "yes"
• Copies other children and adults
• Shows affection (hugs, kisses)
• May have temper tantrums when frustrated
• Shows ownership ("mine!")
• Plays simple pretend (feeding doll, talking on phone)

Milk transition

• Switch from formula to whole cow's milk at 12 months (16-24 oz per day)
• Breastfeeding can continue as long as mutually desired
• Wean from bottles by 12-15 months — use open cups or straw cups
• No low-fat milk until age 2 (toddlers need dietary fat for brain development)

Solid foods

• 3 meals per day plus 2 snacks
• Same foods as the family (cut into safe sizes)
• Offer all food groups daily: grains, protein, fruits, vegetables, dairy
• Let toddler self-feed as much as possible (builds motor skills and independence)
• Portion sizes: about 1/4 of an adult portion per serving
• Expect food intake to vary day to day — this is normal

Picky eating (normal at this age)

• Food neophobia peaks between 18-24 months
• Continue offering rejected foods — may need 10-30 exposures
• No pressure, bribery, or punishment around food
• Division of responsibility: parent decides what and when; child decides whether and how much
• Serve at least one accepted food at each meal alongside new foods

Choking hazards (still important)

• Cut round foods (grapes, cherry tomatoes, hot dogs) lengthwise
• Avoid hard, round, sticky foods (whole nuts, raw carrots, popcorn, marshmallows)
• Always supervise eating; child should be seated

• Total sleep: 11-14 hours per day (AAP recommendation)
• Nighttime: 10-12 hours of sleep
• Daytime naps: transitioning from 2 naps to 1 nap (usually between 14-18 months)
• The single remaining nap is typically 1.5-3 hours after lunch

Nap transition (2 to 1)

• Signs of readiness: refusing morning nap, taking 30+ minutes to fall asleep for a nap, short naps
• Transition gradually — may alternate 1-nap and 2-nap days for a few weeks
• Move single nap to after lunch (around 12:30-1:00 pm)
• Temporarily move bedtime earlier during the transition

Sleep challenges at this age

• 12-month sleep regression (related to walking and developmental leaps)
• Bedtime resistance and stalling tactics
• Climbing out of crib (lower mattress to lowest setting; consider transition to floor bed if safety is a concern)
• Night terrors may begin (partial wakenings with crying — child is not truly awake)

Walking toddlers access new hazards every day. Re-evaluate your home regularly:

• Climbing is new — secure bookshelves, dressers, and TVs to walls
• Move step stools and climbable objects away from counters and windows
• Window guards on all windows above ground floor
• Keep all medications in locked cabinets (even child-resistant caps are not child-proof)
• Poison Control number: 1-800-222-1222 (save in your phone)
• Water safety: never leave unattended near water; empty wading pools after use
• Shoes for outdoor walking (flexible sole); barefoot is fine indoors
• Forward-facing car seat transition: keep rear-facing as long as possible (at least until age 2 or seat limits — AAP recommends rear-facing to the maximum weight/height allowed)
• Keep doors to garages, laundry rooms, and bathrooms closed

• Tantrums: Normal expression of frustration. Stay calm, ensure safety, wait it out. Name the emotion: "You are frustrated." Tantrums are not manipulation
• Biting/hitting: Impulsive behavior, not aggression. Say "no biting" calmly, redirect, and model gentle touch
• Not talking much: Some 12-15 month olds have very few words. Focus on comprehension (does baby understand what you say?). Discuss at 15-month visit if fewer than 3 words
• Extreme picky eating: Normal phase. Maintain mealtime structure, avoid short-order cooking, and keep offering variety without pressure
• Sleep regression at 12 months: Often related to walking, separation anxiety, or nap transition. Usually resolves in 2-4 weeks
• Flat feet: Normal in toddlers — arches develop over the first 5-6 years. No special shoes needed

The AAP well-child visit schedule for this period:

• 12 months: Growth check, vaccines (MMR, Varicella, Hep A, PCV13 booster), blood work (hemoglobin, lead)
• 15 months: Growth check, vaccines (DTaP booster, Hib booster), developmental review
• 18 months: Growth check, formal developmental screening (ASQ-3), autism screening (M-CHAT-R), Hep A #2

The 18-month autism screening

• The AAP mandates autism screening at 18 and 24 months using M-CHAT-R
• Screening is universal — not just for children with suspected delays
• A positive screen does not mean a diagnosis; it means further evaluation is warranted
• Early intervention for autism is most effective when started before age 3

First dental visit

• Should occur by age 1 or within 6 months of first tooth (AAP/AAPD)
• Brush teeth twice daily with a rice-grain-sized smear of fluoride toothpaste
• No bottles of milk or juice at bedtime (tooth decay risk)