Mine is, of course, what Alma Jr. tells her mother when Ennis drops off the girls in the grocery store. I love this line because, like so many seemingly throwaway lines in BBM, it actually holds much more meaning than is immediately apparent. In fact, it kind of captures a theme of the entire movie.
Everyone needs crayons -- i.e., color, pleasure, happiness. Ennis denied those for himself throughout hs life. It's as if Alma Jr., even at five (or however old she's supposed to be there) recognizes this need. When Alma Sr. says "Not now," she's saying, subtextually, that "now," at that point in their lives, there is no opportunity for color or pleasure. At the end of the movie, Alma Jr. presumably is finally about to get her crayons.
