Newton's Kinetic YoYo, Energy Conversion: Educational Innovations, Inc.
Big P Yo-Yos — Duncan Flying Panda Yo-Yo
Amazon.com: WATIEOBOO Yoyo Crystal Unresponsive Yoyo, Professional Yoyo for Kids Adults Intermediate Advanced, with Replacement Responsive Bearing, Responsive Yoyo for Kids Beginners (Clear and Blue) : Toys & Games
Wooden YoYo Spinning Tops | Baker Ross
Wooden Yo-Yo - Maple Landmark Woodcraft | Vermont's Own Gifts & Goods