All babies have their own timetable, but you can watch for certain developments in your 11-month-old. Celebrate with your baby as she reaches or nears these milestones.

Understands how to use many objects (cuddling a stuffed toy, shaking a rattle, putting a cup to her lips)
Understands that objects have names
Understands object permanence well (looking for an object that’s hidden because she knows it’s there)
Has an expanding attention span, from two to three minutes at 8 months to 15 minutes at 12 months
Is attracted to novelty (new toys, objects)
Explores playthings in new ways (touching, banging, dropping)
Increasingly displays memory of recent events
Has good accuracy in picking up objects with fingers (pincer grasp)
Getting better at releasing objects from grasp
Points and pokes with index finger
Feeds self, though messily
May be able to put things into containers
Crawls quickly
Pulls up to a standing position
Stands with support (holding onto your fingers or furniture)
May stand alone briefly
May cruise along furniture
Gestures to communicate
Shakes head or frowns to express “no;” responds when told “no” 
May hold out arms to be picked up
May recognize own name
Recognizes many familiar words
Understands many things said to her
Babbles in long groups of consonant-vowel sounds, like “tata upupup ba ba ba!”
Babbles using the cadence and inflections of real conversation
May use “Ma ma” and “Da da” to refer specifically to parents
May say other early words, though probably not with good pronunciation (“ba ba” for bottle, “mik” for milk)
Accurately mimics the expressions and some sounds made by others
Imitates actions of adults and other children
Enjoys watching older children
Enjoys being around other babies but doesn’t yet play with them
Watches for your reactions (to banging, laughing)
Shows stranger anxiety (shyness around strangers)
Shows separation anxiety (crying or exhibiting distress when you leave the room), which peaks between 10 months and 18 months
Interacts more with family
Waves good-bye