My rule for using iPads are:
-no pictures of other people
-don't wonder or run with the iPads
-handle with care
-treat it like it is your own -when told to do something on the iPad you do it straight away
-don't take the iPad off other people
-no drinks or food around the iPad
-don't mess around on the iPad
-don't go on things you shouldn't
-enjoy on it and do what your told...