T Tangram . Geometric puzzle - set of tiles (usually wooden) made up of five triangles (not all same size) ,a small square and a parallelogram. You use the pieces to make various target shapes (eg big square or oblong), or other patterns , numerals/letters , animals, etc. Thought to have first become widely available in China in the late 1700s and around the world soon after. Design may have been based on sets of Chinese banquetting tables that could be adjusted to fit room shapes/sizes. Never owned a tangram set, but we definitely had some at school