It's held at "Aladdin's Oasis" in Adventureland - it's a live 20-minute or so show featuring Jasmine, Aladdin, and a storyteller who tell the story of Aladdin. They enlist several kids from the audience to help out during the show. After the show, there's an opportunity to meet and greet Jasmine and Aladdin.
There's more of a description, and some photos, on allearsnet: allearsnet.com/dlr/tp/dl/dl_alad.htm