Chances are good that you've owned a yo-yo at some point - chances are equally good that the novelty wore off after a dozen throws that resulted in exactly zero returns. Then someone else would pick up the yo-yo and say, "No, it's easy - watch", and perform a flawless throw, sleeper and return. If that person was really smug, they might throw in a "walk the dog" and some string tricks. And then you threw your yo-yo away and went to play video games.