Milestones chart 1-6m

Child's Age	Mastered Skills (most kids can do)	Emerging Skills (half of kids can do)	Advanced Skills (a few kids can do)
1 month	Lifts head when lying on tummy Responds to sound Stares at faces	Follows objects briefly with eyes Vocalizes: oohs and aahs Can see black-and-white patterns	Smiles, laughs Holds head at 45-deg angle
2 months	Vocalizes: gurgles and coos Follows objects across field of vision Notices his hands Holds head up for short periods	Smiles, laughs Holds head at 45-deg angle Makes smoother movements	Holds head steady Can bear weight on legs Lifts head and shoulders when lying on tummy (mini-pushup)
3 months	Recognizes your face and scent Holds head steady Visually tracks moving objects	Squeals, gurgles, coos Blows bubbles Recognizes your voice Does mini-pushup	Rolls over, from tummy to back Turns toward loud sounds Can bring hands together and hold tightly
4 months	Smiles, laughs Can bear weight on legs Coos when you talk to him	Can grasp a toy Rolls over, from tummy to back	Imitates sounds: "baba," "dada" Cuts first tooth May be ready for solid foods
5 months	Distinguishes between bold colors Plays with his hands and feet	Recognizes own name Turns toward new sounds Rolls over in both directions	Sits momentarily without support Mouths objects Separation anxiety may begin
6 months	Turns toward sounds and voices Imitates sounds Rolls over in both directions	Is ready for solid foods Sits without support Mouths objects Passes objects from hand to hand	Lunges forward or starts crawling Jabbers or combines syllables Drags objects toward himself

you may like to check out milestone-chart-1-to-6-mth

For Bb TK,
he's mastered all the skills at 1m, and even the advanced skills for 2m; Mouths fist, an Emerging skill for 6m; Vocalizes: eeh
at 2m, he's doing alot of hands & leg punching-kicking movements; laughs loudly
at 3m, displayed all the signs for Mastered skills and Emerging skills, and Advanced skills except roll from tummy to back; stares/licks at clenched fists; bats at moving objects and people; Vocalizes: Emm
at 4m, flips 90 deg C on sofas; Plays with his hands, a Mastered skill for 5m