It's not your grandfather's yo-yo any more. Brought to the United States from the Philippines in the '20s, the yo-yo experienced a technological breakthrough in the mid-'90s; check some out yourself at Mrs. Tiggy-Winkle's. By replacing wood with high-tech metals, and shifting weight to the outer edges, you can prevent a yo-yo from returning to your hand. (And you thought that was the point!) The longer it spins down there, the more tricks you can do--see? Dozens of yo-yo sites offer tips and tricks, including videos that walk you through techniques. Of course, you can't spin just one; collect them in a carrying case. If you have a really big allowance, you can spend up to $400 for a factory-made yo-yo--more if you want customized artwork.