A set of components (T1, T2, T3, T4, P1, Figs 1-5) for constructing polyhedra comprises four different tetrahedral components (1, 2, 3, 4) and one pentahedral component (5). All five components (T1, T2, T3, 14, P1) are made up of a selection of five different surfaces (A, B, C, D, E). The surfaces (A, B, C, D, E) include pegs (11, Fig 8) and mating holes (13, Fig 7) for assembling the polyhedra, and determining which surfaces may be juxtaposed. Further components, multiples of the components (T1, T2, T3, 14, P1) and subdivision of the components (T1, T2, T3, T4, P1) may also be provided. IMAGE
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