1. An educational toy comprising a body having a peripheral vertical wall, a guide plate secured on said body and having a plurality of cutouts to be passages, a connecting passage formed between said vertical wall and said guide plate for communicating with said cutouts, a spacer disposed between said guide plate and said body, a plurality of slider pieces slidably and undetachably movable along said cutouts and said connecting passage and a plurality of inwardly extending lugs formed inside the peripheral vertical wall of the body to prevent detachment of said slider pieces.
1. An educational toy comprising a body having a peripheral vertical wall, a guide plate secured on said body and having a plurality of cutouts to be passages, a connecting passage formed between said vertical wall and said guide plate for communicating with said cutouts, a spacer disposed between said guide plate and said body, a plurality of slider pieces slidably and undetachably movable along said cutouts and said connecting passage and a plurality of inwardly extending lugs formed inside the peripheral vertical wall of the body to prevent detachment of said slider pieces. 7. An educational toy as defined in claim 1, wherein said toy is incorporated in a picture book which includes continuous leafs provided with aligned openings; the toy is secured to an inside surface of the back cover such that it is positioned within said openings.