The mom will play...
Or work. Definitely work. When we bought our house we had these lovely chunks cut out of the walls in the older boys' room. The ceiling was falling- slanting... The previous owner cut through the wall and installed beams in my room to hold it up. Then he stuck the cut outs back in and taped them up.
Many, many layers of poly filla ere applied. Four days worth, with sometimes three coats in a day.
Then I started painting. Home mixed paint, once again. It may not turn out the perfect shade of "Norlandic Ice Blue", but if your tastes are less specific, and your wallet less thick, you can achieve a nice shade of blue for little to no cost.
A five gallon pail, the mixer attachment for the drill, and 5 one gallon pails of assorted shades of blue latex paint. Most of these I picked up at the township paint swap last year. One can was a mistint that cost me less than $10.
Now I just need to finish the younger boys' room.