Jedi Training: Trials of the Temple is a show that does not have MaxPass availability. You can watch any of the shows during their times, but in order to participate in the show itself requires registration. Registration opens when the park opens, and is typically a popular one. So, if you want to participate at a particular time, the best bet is to get in line at the registration as early as possible. All members that wish to participate must be present, as participants are asked a few questions. Unfortunately, you cannot register via phone.