Construx was a snap together erector system manufactured by Fisher Price from 1983 to 1988. Mattel later obtained the rights to Construx and gave the system a short and uninspired rebirth in 1997. Most people remember K'nex, Legos, and even Capsella better, presumably because they were backed by commercials and their kits had better designs, but over the long run, I've discovered that Construx had, by far, the most potential of any erector system ever manufactured (as this site will hopefully prove!).