They have some really pretty tiny super fine glitters at craft shops. Irridescent fairy glitter stuff. But most is glass. You have to read, i am always careful to read now since we have kids. Would hate to give them glass. :undecided Also, if you are selling you would need to use FDA approved colorants for cosmetic or bath use. Food coloring isn't supposed to be used for sale. I like the clear ones though! My niece will love this project, she loves all those glitter products. Thanks for posting the directions, she's going to have a blast!