This document describes the card game Set and explores using it to model geometric concepts. It contains the following key points: 1. Set is a card game where the goal is to find sets of 3 cards that are either all the same or all different in each attribute (number, color, shading, shape). 2. The game can be used to model basic geometry concepts like points, lines, and planes. A card is a point, a set of 3 cards is a line, and 9 cards arranged in a specific pattern form a plane. 3. More complex geometric concepts like hyperplanes can also be modeled using sets of cards. A hyperplane is formed from 4 non-coplanar points