Earth Day is Sunday, April 22nd, 2013. Here's a tasty treat for your Earth Day celebration. Popcorn balls that look like the planet Earth! Just make homemade popcorn balls & add a few drops of blue food coloring. Then melt some white almond bark or chocolate. Add green food coloring. Pour melted chocolate into a plastic ziplock bag. Cut a small hole in the end of the bag and create green shapes on each popcorn ball. Happy Earth Day!