I hate when people say there mood is so bipolar. You have no idea what you are talking about. It is a chronic mental illness that is beyond difficult to deal with at times! ~ Bipolar & all mental illnesses are not anyone's fault.
Child Development Chart - The First Five Years - A month to month chart outlining expected development of children's Social, Self-Help, Gross-Motor, Fine-Motor, and Language skills from Birth - 5 Years