ELI5: Explain Like I'm 5

Near-miss Johnson solid

A near-miss Johnson solid is a very special type of 3D shape that's made up of a bunch of flat faces (like a cube or a pyramid). But, what makes it different is that it ALMOST fits within certain rules for what we call a Johnson solid. To explain it better, imagine you have a group of toys that are all made from different shapes like circles, squares, and triangles. You put them together in a special way to create this one really cool and unique toy. Now, let’s say you tried to make another toy using these same shapes, but it’s not quite the same as the first one. It’s almost like the first toy, but has a few differences that don’t quite fit the rules for that type of toy. That’s what a near-miss Johnson solid is - a shape that closely resembles a Johnson solid, but has a few differences that make it unique.