IQ stands for Interlocking Quadrilaterals because it is made up of several of the exact same shape which lock together. There's a few different designs you can make with the same shape. The 30 piece light is the most common. They have kits you can buy but i just traced and cut out the shape out of old mylar plans that work was throwing out. Here's the shape of the pieces and what it should look like when you're done. A few of the possible shapes All 30 cut out
2nd row 4th row All done, notice i have the youtube video on the tv in the background. I had to watch 2 different instructions a few times before i figured out how to put it together. The 30 piece was hard enough, i can't imagine putting the 120 piece light together.