I grabbed black spraypaint for 99 cents at Walmart and sprayed a board I found at Home Depot for 50 cents in the scrap pile.
I spaced out the cards, added ABC's, glued them down, and then covered them with a coating of mod podge to make the whole collage shine. I added a hanger to the back, and then popped it up in my classroom. This would be cute in a nursery as well, but I'm not quite there yet! For less than 2 bucks, I added a little color to my classroom wall.