For 3 nights in a row, we had a little "paint and pour" after the boys went to bed. Mom-E found a great deal on some canvases and paint (<$20). Throw in a bottle of wine (~$10), and voila, wall decorations.
Not bad, eh? Can you guess which ones I made?
And then, because Mom-E is, well, Mom-E, she was just getting started.
Over the next week, she stayed up until about 1 am every night and made a set of 2 curtains to match the wall hangings (plus an additional 5 minutes of help by me hanging the wall posts).
I admit to being biased and a bit prideful, but frankly these are awesome (as is Mom-E). And the boys love their "new" room.