Instead of waiting in line, FastPass allows you to have fun other places. Your FastPass time is usually about an hour after you have received your FastPass ticket. For example, if I go to Space Mountain at 3:00 pm and get a FastPass, I will be allowed to enter the special FastPass entrance beginning around 4:00 pm usually. The FastPass is good for an hour block of time, meaning I have until 5:00 pm to report back at Space Mountain.
Sometimes, the regular (or "Stand-by") line of an attraction is already quite long. If this is the case, your FastPass may not be usuable until a few hours later. Example: If I go to Splash Mountain at 3:00 pm, but the regular line has a 2 hour wait, the time printed on my FastPass might not begin until 6:00 pm or later. FastPass works on the basic principle of spreading out the crowds evenly. Instead of having a 2 hour wait an any attraction at a certain point of the day and only a 15 minute wait at the same attraction later on, FastPass divides the crowds up evenly.
At the FastPass Turnstiles where you get your FastPass, there is a large clock displaying the current time, and the times at which you can return to enter the FastPass entrance (the time that will be printed on your FastPass.)
It is important to note that you can only have one FastPass in use at a time. You cannot, for example, go get a FastPass at Space Mountain and then go get one for Roger Rabbit's Car Toon Spin before you have used your FastPass for Space Mountain. Somehow, in the giant FastPass computer system, it knows if you already have been issued a FastPass throughout the park. Amazing, isn't it?
It is also a good idea to have your entire party present when you get your FastPasses. You want to get them all at the same time, one for each person in your group, to assure you all get the same FastPass entrance time printed on your ticket.
FastPass is currently available at the following attractions: