Japanese Nano Block Toy
These Japanese toy building bricks called "Nano Block" look very much like Lego, just smaller.
They look great to be bought as souvenirs and come in themes for building miniature versions of various Japanese attractions such as the Tokyo Tower, Himeji castle and even the legendary Yamato battleship!
Definitely a good economic alternative in terms of space compared to the traditional Lego as each of the creations take up less volume for storage and display.

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My friend said that he had these blocks but I didn’t believe him!!