Go (game)
The playing pieces are called "stones". One player uses the white stones and the other, black. The players take turns placing the stones on the vacant intersections ("points") of a board. Once placed on the board, stones may not be moved, but stones are removed from the board if "captured". Capture happens when a stone or group of stones is surrounded by opposing stones on all orthogonally-adjacent points. The game proceeds until neither player wishes to make another move. When a game concludes, the winner is determined by counting each player's surrounded territory along with captured stones and komi (points added to the score of the player with the white stones as compensation for playing second). Games may also be terminated by resignation. A teacher might simplify the explanation by saying to a student "you may place your stone on any point on the board, but if I surround that stone, I will remove it."
Icehouse pieces
The pieces are four-sided pyramids that can nest and stack with pipping from 1 to 3 at the base. A group of three pyramids, one of each size, is called a "trio." Each "stash" or set of Icehouse pieces consists of five trios, or fifteen pyramids (variously called pieces, pyramids, or minions) of the same color and five of each three sizes: five large 3-point pyramids (called "queens" in some games), five medium 2-point pyramids (sometimes called "drones"), and five small 1-point pyramids (or "pawns"). The stacked and nested feature is not used in the original Icehouse game, but is taken advantage of in some of the other Icehouse-based games listed below.