Japanese Virtual Boy V-Tetris Bullet-Proof Software Inc. sales promotion toy:

Although the true character of the object is a mystery (we refer to looking at the photographs) 
It seems that it is a structure in which a 1.5v LR-41 battery is inserted, which makes it emit light as far as I understand, look at the backside photograph and see how it seemingly is a shining toy that can give light.
Original price: ¥222

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