An educational ball has a body and multiple operating sets. The body is a square block and has six outer surfaces, six mounting recesses respectively formed in the outer surfaces, and six engaging holes respectively formed through the mounting recesses. The operating sets are connected to the body, are respectively and rotatably mounted in the mounting recesses, and each one of the operating sets has a rotating mount, two covering plates, a sliding groove, and multiple sliding sheets. The rotating mount is rotatably mounted in a corresponding mounting recess, and has an engaging jacket and two inserting holes. The covering plates are connected to the rotating mount, and each covering plate has a connecting pipe, multiple track grooves, and a guiding channel. The sliding sheets are movably mounted in the track grooves of the covering plates and the sliding groove of the operating set to cover the rotating mount.