Student present their sculpture to the class, using geometric vocabulary to describe it. Students examine complicated objects and identify geometric aspects of them, e.g. the shapes of the different parts of a telephone or calculator. One partner secretly makes a solid from a given number of cubes, e.g. 8 cubes, and then wraps the figure tightly in aluminum foil. The other partner examines the foil-wrapped figure, looking and feeling, and tries to duplicate the figure using the given number of cubes. Partners discuss why they think the figures do or do not match before the first one is unwrapped.
Partners trade places and repeat the activity.
Students put the first figure in a paper bag and try to reproduce it only by feeling it. Challenge students further by not revealing how many cubes were used to make the first figure. One student chooses a model of a solid and that they have had experience examining, e.g. a cone, a cylinder, a sphere. The students at the center pretend that they are inside the chosen solid. Show with your hands what it would feel like on the inside.