This cool DIY sliding tile clock is probably the best way to tell the time
It's very cool.

If you're a DIY tinkerer, you've got to have at least one weird or interesting clock around the house. They're easy to make and are excellent conversation pieces for when you haveguests over. If you're still barren of one cool-looking clock, here's some inspiration for you: someone made a device that uses sliding tiles to change the numbers, and it looks incredible.