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.
Students repeat the activity with other three-dimensional solids.
Students discuss the differences, for example between the inside of a cone and a box, or a sphere and a cylinder. Students dictate a story about being inside their favorite three-dimensional figure. Students try to form a numeral with their bodies. Students form the same numeral with yarn and identify the characteristics discussed. Students repeat the activity with other numerals and compare their characteristics.