We wanted something that was as friendly as the iPad. We didn't want the kids to take the devices and then worry about what they were not allowed to do. Some policies sound very unfriendly and that's the last thing we wanted.
So we created what we called an Honorable Use Policy and took everything that would be in an AUP and worded it in a positive way. Instead of saying, "I won't do X" we said "I will do Y." For example. "I will be a good digital citizen in school and not use my iPad for games until I get home." instead of "You will not play games in school on your iPad." Reading it sounds a lot softer and puts a positive spin on a very important set of rules.