Dad has paid the rent at the very beginning of the poem, and with those other bills getting paid, too, all that's left are some good times. The insurance man is also gone and the lights are back on, so all of those simple things that we might take for granted are working just right.
Then the celebration comes with uncle brud playing some Black Jack (presumably) and actually winning a little bit of money. Definitely good times. Later on we learn that mom has just made some bread, also good, and "grampaw" is there too singing and dancing with everyone in the kitchen while throwing a few back. By the end the speaker reminds all children to think about good times like these especially when times are tough.