In "Harry Potter," which magical item selects the students' Hogwarts houses?

The Sorting Hat

What mobile game famously involves slicing fruits thrown into the air? What desert creature did Luke Skywalker ride on Tatooine in Episode IV? Who was Count Dooku's Jedi Master before he left the Order? What ancient Chinese board game has 361 intersection points and black and white stones? What's the name of Ross and Monica's childhood friend who hated Rachel?