How to Make a Cube out of Poster Board


Make a model of a cube for your math class or create a giant pair of dice with just a sheet of poster board, scissors, a ruler and some tape. Once you’ve mastered the 6 1/2-inch cube, you can easily make cubes in all sizes.

Things You'll Need

  • Ruler
  • 28-by-22-inch poster board
  • Pencil
  • Scissors
  • Craft knife (optional)
  • Clear packing tape
  • Measure and mark a 6 1/2-by-1-inch rectangle near the top center of the poster board.

  • Mark a 6 1/2-inch square below the rectangle with the shapes sharing a side.

  • Make three more 6 1/2-inch squares below the first, each adjoining the adjacent square.

  • Measure and mark a 6 1/2-inch square to the left of the second square from the top, again adjoining that square.

  • Repeat on the right side.

  • Make a 6 1/2-by-1-inch rectangle on the outside edges of each of the last two squares.

  • Cut out the cross-shaped template.

  • Score the remaining lines lightly with your scissors or with a craft knife.

  • Fold on the scored lines to form the cube.

  • Tuck the 1-inch tabs into the folded cube.

  • Tape the edges together with the clear packing tape.

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  • Photo Credit DusanTomic/iStock/Getty Images
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