We used air drying clay to make star shapes and cut out a whole with a straw. Then we left them to dry...
Use a brush or cotton bud to paint PVA glue over one side of the star.
Put some glitter on a tray, put the glue side of the star down in the glitter and swizzle it around until it's covered!
Repeat on the other side of the star and put an opened out paper clip through the hole as a hanger.