Pull the hangers out of two of the ornaments.
In the spots where the mirror balls will be glued together, you need to remove some of the mirrors. You can probably pull them off pretty easily with your fingers.
Hot glue the mirror balls together and hold firmly until the glue sets.
Next, use hot glue to attach the scarf and hat.
Use the rounded end of your paintbrush to make a snowman face. Set aside until the paint dries.
Make a snowman nose by rolling a piece of scrap paper into a cone and taping it closed.
Trim the end until it's the length you want, then paint it orange. A sheet of orange paper is even better.
Hot glue the nose to the face. If the original hanger on the mirror ball is covered up, you might need to add a new hanger.