Sun clock that helps with telling time. This is a cute and easy way for kids learning how to tell time, because it is right under the clock and the rays represent the 5 minute intervals and that can make it easy for kids.
Another creative clock decoration. Use a large cardboard circle with a hole in the center for the clock. Glue on Crayons (markers, pencils, etc. (If clock top is close to ceiling, the crayons and pencils can be trimmed to fit.