Physical: Baby is crawling and may be crawling toward furniture to pull herself up to a standing position. Baby can feed himself with hands and finger foods. Baby loves to hold onto two objects - one in each hand. Vision is almost fully developed.
Cognitive: Baby realizes the difference in size of objects and begins to understand the use of objects. For example: juice comes from a sippy cup.
Social/Emotional: Baby no longer simply accepts food. He turns his head away to reject food he does not want. Baby begins multi-syllabic babbling to interact with adults, such as baba, dada or mama.