Keep-Away Ball
From Shadow of the Throne Wiki
A toy devised in the Golden Age for the children of the Exalted, this brightly colored ball has to be stored in a box or deep bowl, because when placed on the ground, it will try to roll away from anyone who comes within ten feet of it. It doesn't roll too quickly for an adult to catch up with it, and it can't roll up any incline steeper than about 30 degrees.
Occasionally players of the sport Warudi have been known to make use of Keep-Away Balls to add additional challenge to their matches.
Source: Adapted from original by Arbane the Terrible on RPG.net