2 Months: smile, follow past midline, ooo/aah, head up at 45 degrees

4 Months: regard hand, grasp rattle, squeal/laugh, bear weight on legs

6 Months: feed self, reach, imitate speech sounds, pull to a sit-no head lag

9 Months: take 2 cubes, jabber, pull to stand, sit unsupported

12 Months: wave bye, pat-a-cake, pincer grasp, dada/mama, stand 2 seconds

15 Months: play ball with examiner, scribbles, 2 words, walk well

18 Months: use spoon/fork, drink from a cup, 2 cube tower, 3 words, runs

24 Months: remove garment, 4 cube tower, 6 body parts, walk up steps

3 Years: wash/dry hands, 8 cube tower, 2 adjectives, broad jump

4 Years: dress- no help, copy circle, speech all understandable, hops