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What are Lego bricks made of?

Lego bricks were always made of plastic. However, the quality of the plastic kept changing throughout the years. For instance, cellulose acetate polymer was used from 1949 to 1963; this is the same compound that is used in the plastic frames of some eyeglasses and certain movies.

Later, Lego switched to another polymer known as ABS (acrylonitrile butadiene styrene). It offered a lot more advantages than the previous acetate polymer like resistance to color fading, stronger, etc. However, since ABS is opaque, it could not be used to make transparent parts. In this case, polycarbonate plastic was used.

From the above, we see that Lego army guys are made of plastic that is safe. However, they tend to hurt a lot when you step on that, and you can blame it on ABS. These bricks are made to be tough so that they can withstand great pressure without breaking. Additionally, the Lego bricks are made of non-toxic materials.

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