Clockwork knowledge

Have you ever seen such a cool wall clock. My 14 year old got it as a birthday present from one of his aunts. The clock has been produced by Tekna and uses elementary(?) mathematics to represent the hours. My kids do not understand it all yet, but they were amused by my enthusiasm.

The clock has now replaced the old kitchen wall clock, so that we get more exposure to mathematics every day.

The values in green are linked with Tekna's history. You can read about it in the Wikipedia page. Or you can visit their web site at http://www.tekna.no.