| 摘要 |
<p>A set of triangular hollow prisms 1 each having a symbol 3 on at least one of its faces such that the prisms may be arranged in a row, typically to produce a word or a picture. The symbol may be a letter, number or a picture and the device may be used to play a game, display a word or as a teaching aid. The triangular prisms can be made from folding card material, using a tongue and slit fastening or can be plastic blocks. The prisms may also have a vertical column allowing them to be arranged vertically.</p> |
