An educational toy useable to teach elementary mathematics to children includes a spaced series of mutually aligned parallel rods secured in a side-by-side relationship at their opposite ends to a base portion of the toy. Series of counting beads are captively and slidably mounted on all but two of the rods for movement between their opposite end portions. The remaining two rods, each of which has at least one counting bead rod on each of its opposite sides, slidably carry two operational sign beads having convex polygonal cross-sections. Different equation operation sign indicia are suitably positioned on the flat exterior side surfaces of the sign beads such that they can be rotated about their rods to display selected operational signs to the user of the toy. Opposite end faces on each of the sign beads are recessed to nonrotatably receive projecting boss portions of the base at the opposite ends of the sign bead rods, thereby permitting the sign beads to be releasably locked against rotation away from their selected sign display orientations. By sliding the two sign beads and appropriate groups of the counting beads onto the same end portions of their associated rods, and rotatably adjusting the sign beads, a variety of simple mathematical equations can quickly and easily be represented by the beads in a form easily understood by a child.
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