Well, Mr. Plum has learned to sit up on his own, with the assistance of the bars in his crib.
Pro: Yeah Mr. Plum! Way to catch up on those developmental milestones, and beat your sister to one for a change.
Con #1: Mr. Plum does not know how to then go BACK to a lying position.
Con #2: Mr. Plum is placed in his crib when he is sleeeeepy … see Con # 1.
I am tired.