The little stud on top of a LEGO minifigure's head has a ... | funfact.wiki | funfact.wiki
The little stud on top of a LEGO minifigure's head has a hole through it. Since the late 1990s, LEGO has drilled it on purpose so that if a child swallows the head and it lodges in the windpipe, air can still pass through.
A 2x4 LEGO brick made in 1958 still clicks perfectly onto one made today. LEGO holds manufacturing tolerances as tight as 0.002mm — thinner than a human hair — across the billions of bricks it molds each year, with only about 18 in every million pieces falling outside spec.
The face on a Lego minifigure is yellow, and it isn't a design accident. When Lego created the minifigure in 1978, it deliberately chose a neutral color that wouldn't represent any specific ethnicity — and yellow became the official choice.
Every Lego brick is molded to a tolerance of about 10 micrometers — thinner than a human hair. That precision keeps the defect rate to roughly 18 out of every million bricks produced.