1.Go to a toy shop and buy at least 15 rubic cubes.
2.At home break carefully all the rubic cubes into pieces.
3.Glue / hotglue colorful pieces as you wish them to look.
4.Get a broken but still working clock and glue / hotglue unused parts of rubic cubes to the clock's base.
5.Now you can make different designs and combinations of colorful squres as numbers.