I have to say, it's impressive how such a simple image encompasses so much meaning. This is exemplary of brilliance in its simplicity. To be honest, I think I've seen something similar before, but the concept is still a very wise one. It's something I may print to remind myself of the importance of limited time.
If you decide to make that wooden model, then please submit it as part of the weekly art contest I'm holding! I would likely select it as a winner, unless there's some other truly majestic competitor.