use food dye to make ice cubes. Then put them in a glass of water-voile. Would be good for a party. Rainbow ice water - Taste the rainbow! - this would be cool for Christmas drinks. Red, green and edible glitter!
Button cookies - love this idea! You need a shortbread (butter cookie) recipe, two biscuit cutters (one slightly smaller than the other), and a drinking straw (to make the holes). Aww, cute as a button!