Step: a measure or action, especially one of a series taken in order to deal with or achieve a particular thing

S has reached a new milestone: climbing the stairs. Only in the past week or two has she started crawling and pulling herself up to a standing position. It took her a little while to figure out crawling. She was scooting and doing a down-dog position for a little while before she got the hand-knee-hand-knee motion down. I actually missed…