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cover image of Ideas changing the World. Logical gaming devices combined with a ball-pen

Ideas changing the World....

Valeriy Zhiglov Author
(2018)

cover image of Thinker. Logical gaming device, which combines the elements of Rubik's Cube, the 15 puzzle, Dominoes and playing cards

Thinker. Logical gaming...

Valeriy Zhiglov Author
(2018)