The contribution deals with demonstration of „Geometrical folder" in plane and space as a tool for pupil 's imagination development. The example of task in the plane is to fold step by step various plane patterns from a set of "universal" patterns as parts. Analogically, the example of task in space is to complete specified body from a set of various parts. Using this exercises I investigate a difference of a space imagination between boys and girls, and between younger and older students.
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