Just cut stars in increasing sizes and string on thread.
You could also use Glitter Fabric.
Use anything to decorate - sequins, beads, buttons or tinsel stems.
You could use glitter fabric or snowflake felt.
You could use a cookie cutter for the shape.
Products
Felt
Safety Eyes
Joggle Eyes
Crafty Knits DK Yarn
James C. Brett Crafter DK Yarn
Nylon Cord