Foldify by Pixie Foldify App is a great tool for creation on the iPad. A student can use the app to create and decorate a 3 dimensional papercraft. When they are done they can then print it out, cut it out, fold and assemble.
The interface is a split screen. On the left is a rotatable image of the final product. It is updated as the user makes changes. The right side of the screen is the flattened template of the papercraft. There the user can paint and draw with unlimited colors. In addition there are a wide variety of stickers to use to decorate their design.