Developmental Sequence

Question 1

2 Months

Answer 1

Holds head up

Question 2

3 Months

Answer 2

Prone on elbows

Question 3

4 Months

Answer 3

Prone on extended arms, prone to supine rolling, propped sitting (boppy), may start to eat some solids

Question 4

5 Months

Answer 4

Supine to prone rolling, roll with control, prone reaching, pull to sit

Question 5

6 Months

Answer 5

Independent sitting balance (on hands), babbling, bouncing in standing with support

Question 6

7 Months

Answer 6

Crawling, pivot prone, sit erect (no propping), transfer objects hand to hand, know their name and the word no (if they have heard it)

Question 7

8 Months

Answer 7

Transitions, scooting backwards, 4 point rocking, words: “mama” “dada”, pivot in sitting

Question 8

9 Months

Answer 8

Creeping, pull to stand, stand and support, hold own bottle, object permanence

Question 9

10 Months

Answer 9

Cruising, play games

Question 10

11 Months

Answer 10

Squat to stand (unsupported), stack blocks

Question 11

12 Months/1 Year

Answer 11

Immature walking, 1-2 words, help with dressing (mostly undressing)

Question 12

13 Months

Answer 12

Full UE ROM, still lacking full motion at hip and knee, plantar arch starts, BOS narrowing (if walking), Abs help with balance, scribbling and eat crayons , imitate sounds

Question 13

15 Months

Answer 13

Independent walking with medium guard, assumes standing, creeps up stairs, starts stacking 2 items, follows one step commands, waddling , points and vocalizes needs, books

Question 14

18 Months

Answer 14

Curious, climbing, turn knobs, full LE ROM, heel strike and arm swing, stops and starts easily, mature weight shifts, runs stiffly, stairs with one hand held, throws ball, larger vocabulary and understanding, push pull toys

Question 15

21 Months

Answer 15

Squats in play, kicks ball, stairs with railing or one hand held, follows commands, names body parts, use cups but may spill, 5-6 cube tower, combines words, starts maturing on communication and social skills

Question 16

24 Months/2 Years

Answer 16

Culture plays a part: very busy, vestibular experiences, running is stiff and flat footed, climbs and jumps, mature weight shifts in gait, independent stairs, dressing with assist, large vocabulary (3 word sentences), start to lose pot belly, counter rotation, understand themselves separate from other people, maturity in social interaction (if no social interaction, skills will regress – orphanages), loves other babies

Question 17

30 Months/2.5 Years

Answer 17

Walks on tip toes, jumps with both feet, tries to stand on one foot, holds crayons with fingers, brain is organizing, crave motor and sensory opportunities

Question 18

36 Months/3 Years

Answer 18

Combines movements, half of adult height, runs and changes directions, smaller BOS, mature stair pattern, jumps off of 2 foot stool, rides tricycle, kicks ball, stands on one foot briefly, reciprocal arm swing, tries to catch, knows rhymes and songs, follows short commands, jumps off of 24-34” stool

Question 19

42 Months/3.5 Years

Answer 19

Wants to do everything independently, frustrates easily, increased muscle mass, multiple jumps in a row, hopping on one foot, kicking and catching inconsistent

Question 20

48 Months/4 Years

Answer 20

Potty trained, hops, skips inconsistently, walks on tip toes, rides bike with training wheels, overhand throw, drawing and copying, 4 step commands, why?, names and sorts objects

Question 21

54 Months/4.5 Years

Answer 21

Walks heel to toe, jumps 2-3 inches off floor, catches ball with elbows at side, throws 8-10 feet, hand dominance begins

Question 22

60 Months/5 Years

Answer 22

Runs, dances, climbs, jumps in all directions, jumps over 6-8 inch objects, rides bike without training wheels, skates, skips correctly, manipulates objects, counting, colors, imagination

Question 23

6-12 Years

Answer 23

Girls ahead by 1 year in development, seek vestibular input, increasing complexity of skills, mature gait pattern by age 7, growth spurt (girls 10-12 inches, boys 13-16 inches)