به هر نوعی که بشنیدم ز دانش

 

به هر نوعی که بشنیدم ز دانش

نشستم بر در او من مجاور

نماند از هیچگون دانش که من زان

نکردم استفادت بیش و کمتر

نه اندر کتب ایزد مجملی ماند

که آن نشنیدم از دانا مُفسّر

                                   

ناصر خسرو

دانش

 

 

 

The tangram (Chinese: 七巧板; pinyin: qī qiǎo bǎn; literally "seven boards of skill") is a dissection puzzle consisting of seven flat shapes, called tans, which are put together to form shapes. The objective of the puzzle is to form a specific shape (given only an outline or silhouette) using all seven pieces, which may not overlap. It was originally invented in China at some unknown point in history, and then carried over to Europe by trading ships in the early 19th century. It became very popular in Europe for a time then, and then again during World War I. It is one of the most popular dissection puzzles in the world.[1][2]

 

http://www.archimedes-lab.org/tangramagicus/pagetang1.html 

 http://www.gieson.com/Library/projects/games/tanaman/index.html#

 تانگرام

 

Origami

اُریگامی

 http://www.origami-resource-center.com/index.html