Abstract: The invention is a yo-yo in which at least one of the yo-yo's sides includes a powered rotation system capable of maintaining the yo-yo's rotation when the yo-yo is sleeping at the end of its tether. The system functions by converting one of the yo-yo's sides into a motor, and includes a number of permanent magnets, an electromagnet, a sensor capable of detecting a magnet field, and a power source.

Abstract: The invention is an improved yo-yo that features unique multi-piece sides. Each side has a removable disk that functions to affect the yo-yo's responsiveness via one or more tether engagement structures that can be contacted by the yo-yo's tether. When the removable disk is made of a resilient material, the disk can be compressed to change the yo-yo's responsiveness. Each removable disk may also form the associated side's rim and thereby functions to substantially define the side's shape. By replacing one set of removable disks with another, a user can quickly and easily change the yo-yo's shape and/or rim material and/or responsiveness.

Abstract: The invention is a yo-yo that includes features that enable a user to adjust the yo-yo's responsiveness. Each of the yo-yo's sides has a movable shuttle having a tether engagement surface. By changing the position of one or both shuttles, a user can affect the yo-yo's ability to return on command. Preferably, the yo-yo also includes readily visible indicia associated with the shuttle's positioning apparatus so that a user can easily set and/or ascertain the yo-yo's responsiveness setting. A user can also change the yo-yo's responsiveness by replacing one set of shuttles with another set that has different tether engagement adaptations. The yo-yo may also include a conventional adjustable string gap and removable rim members.

Abstract: The invention is an improved yo-yo that features unique multi-piece sides that have removable shape disks secured by a novel fastening system. The fastening system enables lockable securement of the shape disks via a sliding ratchet-type detent apparatus that can be operated without tools. By replacing one set of shape disks with another, a user can change the shape of the yo-yo and/or change the material of the rim of each of the yo-yo's sides. This enables a user to adapt the yo-yo's performance characteristics to suit the user's needs.