What you'll need:
Silver or glittered Christmas balls (plastic)
Bag of gems
Toilet paper holders (or paper towel or tulle holder)
Spray Paint (any color you prefer)
Optional: Duct tape in any color(s) you prefer
Step one is to spray paint them. Either lightly for a faded look or twice for a solid/opaque look. Let dry overnight.
Step 2 is to get out your hot glue gun and glue the top of the ball (ornament hanging part) to the top of the microphone base.
Step 3 is to simply put the mics and gems out with some glue and let the kids go to town!
Here's another fun and easy mic using duct tape.
And a party table using them some as decoration.
Works great on water bottles, too!