Great mason jar idea - try to make this on your own! - you could really use any old jar - soak the label off with oxyclean and warm water first. You could do Christmas jars, too. white for snowman, green tree with sequins glued on as lights.
37 Pumpkin no-carve decoration ideas. Tacky glue crayons on white pumpkin. Blow dry on high until they melt. Have on dropcloth or newspaper, wax can splatter. i would do this with all red crayons to look like blood splatter or something