Abstract: A two dimensional educational game device (10) in accordance with a first embodiment of the invention includes a plurality of flat rectangular members (15, 30) having arcuate front and rear ends (21, 25) and non-parallel opposite sides (23, 23a) such that said members, when properly interfitted, form a circular pattern. Each member (15) has a number of arithmetic operator printed thereon to establish an array of radially and circumferentially correct mathematical equations. A three dimensional educational device (40) in accordance with a second embodiment of the invention includes a plurality of stackable trays (45) having a circumferential flange (51) extending around each tray (45). Rectangular block shaped members (60) are circumferentially positioned in each tray. Each member (60) includes an outwardly extending surface portion (64) having upper and lower inclined surfaces (66, 68).