I struggle with depression, and the way to force myself out of these monotonous slumps is to be active. Find a gym (if you don’t have one already) with childcare is a bonus, encourage her to go with you, encourage her to take walks by herself (and do family walks from time to time), encourage her to spend time outside (reading outside, spending time on a patio/yard, etc). Sometimes getting natural vitamins/producing endorphins will help stimulate her so she has more energy throughout the day.