transfers objects between hands
6 months
social smile
2 months
copies a circle
3 years
stranger anxiety
6 months
separation anxiety
12 months
takes first steps
12 months
completes toilet training
5 years
knows gender
3 years
sits with support
4 months
pincer grasp
9 months
sits unsupported
7 months
says first words
12 months
transfers objects between hands
6 months
begins rolling
4 months
block tower rule
age in years x 3
uses 2-word phrases
2 years
100% language understandable
4 years
uses 10-25 words
18 months
75% language understandable
3 years
cruises
9 months
copies a line
2 years
copies a cross
4 years
copies a square
4 years
copies a triangle
5 years