Make your own wizard's hat out of construction paper. Make a bright-colored purple or blue hat with glittery stars on it or go for a plain brown or gray wizard's hat.
Create a cone shape following either of these:
Decorate the hat with moon and star stickers or cut out some paper shapes. We have these printable moons and stars that you can print out on A4 or Letter size paper. Decorate them with glitter if you like. Allow them to dry completely before gluing them all around your wizard hat.