I designed a velcro case that is to snap on over the iPad. This case was originally supposed to have two wooden spheres on the back for handling, but these spheres kept falling off. Instead, I gave it a Styrofoam sphere that had a clothes pin stuck into it to act like a stand.
Going forward, I would reinforce this with stronger prototyping material,–such as cardboard– I would create a sliding folding mechanism on the sides to accommodate for sizes, and I would make a shelf to prevent slipping.