If you haven’t picked up a boxed jigsaw puzzle in a while, trust that they’ve undergone a serious transformation since your childhood. One of the most innovative companies in the category is Nervous System, a self-described “generative design studio” that composes computer programs to create puzzles based on patterns found in nature.

Their latest project, Geode, is a line of jigsaw puzzles modeled after agate stone. Like the rest of Nervous System’s puzzle inventory, it has an unusual and dynamic design; it's meant to mimic the band pattern of actual agate created by trapped gas in volcanic stone.

Nervous System

According to Nervous System’s site: “To create the organic shape of the pieces, we designed a system based the simulation of dendritic solidification, a crystal growth process similar to the formation of snowflakes that occurs in supercooled solutions of certain metallic alloys. By varying the parameter space, the system can produce a variety of cut styles. Each puzzle produced features its own unique landscape of interlocking shapes. No two are alike.”

Though lovely to look at, the puzzles utilize Nervous System's "Maze" piece-cutting method, which results in irregular and distorted shapes that may prove "fiendishly difficult" for some.

The 8.5-inch puzzles are made from plywood and feature 180 pieces. You can grab one for $60 at Nervous System’s online shop.

[h/t MyModernMet]