Looney Pyramids are colored pyramids that are used in many published and user-created games. They were originally part of the single game Icehouse created by John Cooper, and until 2011 they were generally called Icehouse pieces or Icehouse pyramids. The original game, Icehouse, is based on a fictional game Andrew Looney described in a story he wrote.
The general utility of the pieces: They stack and can be laid on their side and pointed in a direction, and their general "cool" look, gave rise to people creating many other games that use them. Some need nothing but the pieces, others use the pieces along with other generic easy-to-come-by gaming equipment like dice, markers, or checker/chess boards.
In the past, Looney Pyramids have been sold in several forms, including box sets, like in IceTowers, and individual single-colored "stashes" of 15 pyramids (5 copies of each of the 3 sizes). From 2006-2010, Looney Labs sold the pyramids as part of the game Treehouse, which included each of the three sizes in 5 different colors, plus a Treehouse die. Both the single-colored stashes and the old Treehouse came in plastic tubes.
Starting in 2011, Looney Pyramids have been sold in pyramid-shaped bags, which contain pyramids, the rules to one or two games, and any accessories needed to play those games. The first such product, called IceDice, contains 30 pyramids in 5 colors and special IceDice. A new Treehouse in a pyramid-shaped bag was released in 2012. Pink Hijinks, which contains 9 pink pyramids, was also released in 2012. Also available is a pyramid-only product in a tuckbox, containing 15 pyramids in 5 colors but nothing else.
Stashes cut from semi-precious stones are independently available.
The book Playing With Pyramids was published containing 12 of the more popular games; the book 3House reprints two of those games and introduces another.
First 100 set (1989) - Four solid, resin-cast stashes in red, yellow, green, and blue in a black box. Each has a unique number assigned to it. These pyramids tended to stick together, and have brittle tips. Instructions for Icehouse game included. These are rare and collectible today.
Paper Icehouse (1991) - die-cut foldable coardboard sheets for assembling four stashes in standard colors (red, yellow, green, and blue) or neon colors (purple, orange, lime green, and hot pink).
Xyloid Icehouse (1992) - Solid wood pyramids, stained with color. Four stashes in red, yellow, green, and blue. Sold in a black embroidered cloth drawstring bag.
Icehouse: The Martian Chess Set (1999) - Clear acrylic box containing four hollow plastic stashes in red, yellow, green, and blue. Included rules for four games: IceTraders, IceTowers, Martian Chess, and Zarcana.
Black Ice (2000) - expansion for I:TMCS. Included black and clear pyramids (first appearance for both colors), and a chessboard bandana in a hemp drawstring bag. (The coupon can be redeemed for a free copy of the book 3HOUSE.)
Giant Pyramids (2001) - limited run of 8X scale pyramids in cardboard.
Monochrome stash tubes (2001-2006) - One stash of hollow plastic pyramids in a clear plastic tube. Available in red, yellow, green, blue, black, clear and new colors purple, orange, and white.
Root Beer & Watermelon (2001 and 2004, respectively) - These one-of-a-kind stashes were accidentally created as a manufacturing error, and sold on eBay.
Zendo boxed set (2003) - Cardboard box containing four hollow plastic stashes in red, yellow, green, and blue, plus rules and accessories for Zendo.
IceTowers boxed set (2003) - Cardboard box containing four hollow plastic stashes in purple, clear, white and new color cyan, plus rules for IceTowers and the Empty City novel. (Cyan later became available as a monochrome tubed stash.)
Treehouse (2006-2010) - one "Treehouse set" of hollow plastic pyramids, five nests in five different colors, in Rainbow (red, yellow, green, blue, and black) or Xeno (purple, orange, cyan, clear, and white), plus a custom Treehouse die and rules to Treehouse. Used the same clear plastic tube as the monochrome stashes.
Gray pyramids (2007) - set of five small gray pyramids sold as a Volcano accessory. (Full stash available briefly on the website.)
Pink Treehouse (2008) - one stash of hollow plastic pyramids in new color pink. Sold in a cardboard box.
Electric Yellow (2011) - one stash of hollow plastic pyramids in new color electric yellow. The color was a production error, so it's a limited run sold only through the website.
IceDice (2011) - two Rainbow Treehouse sets of hollow plastic pyramids in a blue pyramid-shaped zippered cloth bag, with dice and rules for IceDice and Launchpad 23.
Treehouse (2nd edition) (2012) - one Rainbow Treehouse set in a green pyramid-shaped zippered cloth bag, with dice and rules for Treehouse and Pharaoh.
Pink Hijinks (2012) - nine pink plastic pyramids in a pink pyramid-shaped zippered cloth bag, with a die and rules for Pink Hijinks.