Trace and cut out a circle on a piece of poster board.
Draw a simple constellation. We chose the Big Dipper (Ursa Major).
Leave spaces between each line to dot with a marker.
These dots are your star formation.
Now, poke out the dots with a hole punch or sharp object.
Find a dark room in the house and shine your flashlight against the disc to create a constellation on your wall.
Experiment with the distance between the lamp, the disc, and the wall to get your best constellation shadow!
Other easy constellations are Orion (the hunter), Leo (lion), Pisces (fish), and Canis Major (dog).