You may be familiar with the letters and alphabet prints by Binth. They have been around since 2007, I think. What I did know what that you can go for single letter print instead of the entire alphabet. It is a cheaper option. Any one of those will look great in a nursery or a kids playroom.
By using a deep frame, the single alphabet art print can be placed on a desk or a bookcase instead of hanging it on the wall. You can write a small word with the 5 x5 inch frame boxes.