This is something that I have used for the last few years with my kiddos. It's a good reminder for them to see every single time they open their iPads that they have rules.
All you have to do is set the rule page as a lock screen on your iPads. I have also included numbers for the iPads. I give each iPad a number and then save the number picture as a background on the iPad.
I have several different colors. I also have included an editable version for both the rules and the numbers.
If you have any questions let me know! I would be happy to help.