Sign Up for Runza® Rex’s Birthday Club! | Hey Parents! | Sign your child up for Rex’s birthday club to receive a FREE Kids Meal! | The Children’s Online Privacy Protection Act (COPPA) requires that we ask for the birth date of the person submitting the information. Please enter the date carefully. If you make a mistake, we may not be able to process your request. | Please enter YOUR (parent or guardian) birthday below: | Runza Tast-E-Mail | Offers, announcements and the occasional bad pun, right in your inbox.