Each stash or set of Icehouse pieces consists of fifteen pyramids of the same color in three different point (or pip) values: five large 3-point pyramids, five medium 2-point pyramids, and five small 1-point pyramids. The commercially produced plastic sets are hollow and can be stacked and nested; this feature isn't used in the original Icehouse game, but is taken advantage of in some of the other Icehouse-based games listed below.
Icehouse sets are sold by Looney Labs. There are tubes containing one stash of durable crystal-look plastic pieces in a single color, and a less expensive starter set called Paper Icehouse (actually cardstock), in four colors, which one punches out and folds into the pyramid shapes. The Icehouse website also has instructions for making your own pieces.
Icehouse pieces can be used to play many different abstract strategy games. Most games need at least two colors, and some require other readily-available equipment such as glass stones or a checkerboard. Rules for these games can be found on the Icehouse website. Some are also available in Playing with Pyramids, published by Looney Labs.
Games that use Icehouse pieces include: