After you’ve gotten the cracked pattern that you like, use glitter glue to paint sparkles all around the piece. Fill your paint brush what a good amount of glitter glue and paint in a crosshatch motion.
After the glue is completely dry, take the glass pieces outside and spray with two coats of a clear protective spray paint. Make sure your glass piece is completely covered with the spray protection, if not your glue and crayon effect will wash off with water.
When you’re finished, you’ll be able to enjoy the beautiful crackled glass look without the expense or having to blow glass!
Step by step instructions: Here