The amount of wastage that is in packaging these days its nice to use materials that lessen the impact on our environment. Instead of throwing out your boxes from cereal, cut them into strips then into squares. You will be amazed at the different colour varieties you get. For younger children draw up a sheet of paper with squares marked out already for them in which they can paste and place the cardboard squares into. For older children they will enjoy using their own template to make their own mosaic picture.