You can create pixelated little monkeys with the 'Sprite Something' iPad app.
The app is quite cool because it has many options such as differing image sizes and a range of color options and combinations. Another cool feature of the Sprite Something iPad app is that you can layer images on top of each other and the design will still remain consistent. This retro app is just one of the many fantastic things to come out of the creation of the iPad. Chyeah, pixels.