Why does stepping on a LEGO hurt so badly? Let's start with the tiny brick itself. Legos are built to hold a lot of weight, so they don't break under the pressure of a sky-high Lego tower. (Or a 64,500-Lego Golden Gate bridge.) In fact, according to Fatherly editorial director Micah Abrams, "a single Lego can bear up to 4,240 Newtons of force, or weights in excess of 953 pounds, before it starts to deform."
Most of the time, Legos are pretty great. They spark kids' interest in engineering, and are surprisingly fun for full-grown adults. That is, until you're walking through a messy playroom and find yourself screaming because you stepped on a single tiny toy brick. So what's going on? You can thank science for that piercing pain.