There are four types of constellation sheets, one for each season. Apply it to the cardboard, then poke holes into the round spots, and you can easily make a constellation. The sharp part of a pen or ice pick is sufficient for this task, but please have an adult do it. The trick is to make both big and small holes, this will make it more three dimensional and it will more closely resemble a constellation.
Decorating the outside of the cardboard is also one part of the fun. For instance, cutting out and pasting paper stars, or painting it the color of the night sky. And drawing pictures to match the season of your desired constellation sheet. Next are the sides. Cut out a hole that’s the size of your head in order to create the “Entrance” to the planetarium.
Once that’s finished it’s finally time for the projection. Make the room bright, and get excited to slip into the Entrance. If you look up at the sky, you’ll see big and small twinkling lights. And once your eyes adjust, you will be able to see the constellation for the season.
We recommend learning the constellations from Kitt Otte’s original constellation guidebook. Or you could play a game where you compete to find the most constellations. And isn’t it great to find a fun practical use for all those cardboard boxes you have piled up.