Definitely sparkles or something for pixie dust!
I'm going to give a quick rundown of a couple of points of the movie version of Tink, so if they ask questions or whatever you're prepared.
*In Tink's fairy world, every fairy is born from a human baby's first laugh, and when they get to the world, they get a talent, which is kind of a job, and it's pretty much fate because the talent chooses you. It's kind of like the Sorting Hat sortting witches and wizards into Hogwarts houses. The fairies use their talents to make Earth's seasons come and go.
*Tink is classified as a Tinker talent, someone who builds and fixes things. She has some friends of other talents, Rosetta, a Garden talent, Fawn, an Animal talent, Iridessa, a Light talent, Silvermist, a Water talent, and Terence, a Dust talent(delivers daily pixie dust to people). She also has a frenemy, Vidia, a Fast Flying talent, and a sister, Periwinkle, a Frost talent. Sh has pets, a mouse named Cheese and a firefly/lightning bug named Blaze.
I think that's about it. You could bring some flowers or treats for the guests too.