We do Design a tee every trip and love it.
Our arrival day is usually DTD, dinner and then the EMH at whichever park has them.
Design a tee is almost like doing it on the disneyworld store design a tee.
Only they have big colored computers to do it at.
First you choose your shirt (short or long sleeve), size and color. Then you pick what picture you want on it, followed by any saying (has to be a "nice" saying. No profanity).
You can do both front and back if you wish.
Here are 2 pics of ours...different trips. (first one we were soaked, from being in the rain all night)