What I can't stop making with the History Brush, and which you might enjoy trying out, are what I'm calling "illustrated" portraits. You start with a well-composed photograph of a friend or loved one and, by using various overlays in combination with the history brush, you end up with a portrait that places your subject in the foreground with an illustrative background — almost like a comic book in some ways. You're basically creating a very rich, textured background while leaving your subject in real-world focus.
Give this a shot. You might find that what you end up creating is artwork worthy of being printed on canvas and hung on the wall. Come to think of it, it's probably one of the best gifts you could give someone: an artistic portrait that's handmade and extremely creative.
Step 1: Start with a great photo and choose your effects
Open your image in Pixlr Express and do any normal photo editing you would do like auto-adjust or color correction. Then, think about the overlays you want to use. You may want to try a bunch out (use that undo button!) until you find the two or three that really work with the photo you're using. The point here: You're going to work in a step-by-step fashion, so it's probably best to know which filters you want to use ahead of time and then work in a very deliberate way.