The educational game Djeco Eduludo Primo Tri introduces children to sorting, organizing, and close observation. A sturdy wooden frame holds nine rotatable wooden triangles featuring various motifs. Using ten included criterion cards, children select the matching illustrations and turn the wooden prisms until the desired picture is on top. A total of 18 varied image motifs challenge logical thinking and fine motor skills. Thanks to the solutions printed on the backs of the cards, direct self-checking is possible. The set includes the wooden frame with triangles, ten criterion cards, and instructions.