How to make a megaphone from poster board

Written by r.l. cultrona
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Having your kids do scientific experiments is not only a fun way to kill a couple of hours of an afternoon, but it also promotes their brain development. One of the easiest science experiments you can do with children is to build a megaphone and teach them about sound. Building a megaphone is something that the kids can help you with, so the entire project can be fun for the whole family.

Skill level:

Things you need

  • One large piece of poster board
  • One large circular template (a large mixing bowl will work)
  • Pencil
  • Scissors
  • Tape

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  1. 1

    Place the poster board on a flat surface. If it begins to curl, tape the corners down to ensure a flat piece of paper.

  2. 2

    Put the circular template on top of the poster board. Try to fill as much of the poster board as possible. Draw a circle with a pencil.

  3. 3

    Cut out the circle using the scissors. Discard the extra poster board. Once the circle has been cut out, cut the circle in half.

  4. 4

    Roll one of the half circles along the straight side, until you get a cone shape. Attach the two sides of the cone using tape.

  5. 5

    Cut off the top point of the cone to create a smaller circle, which will act as a mouthpiece. Repeat the process for the other half circle to create a second megaphone.

Tips and warnings

  • If you are worried about cutting your lips on the mouthpiece edge, make two small cuts along the edge of the mouthpiece and fold the edges in. This will create a smoother edge.
  • If your children are going to be cutting out their own megaphone, make sure you have safety scissors, so that they don't hurt themselves.

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