We absolutely encourage you to use your phone to show us your tickets.  There is no need to print the email or barcodes.  Our contactless turnstiles will allow you to scan the barcode right from your phone.
We ask that you have your phone ready with your email pulled up once you pass through security.  Please note that Sleepover Tickets are not viable for entry until 6:00pm, but allow for all day admission the morning after the sleepover.