Hourglass project and Magbot pendulum in the spotlight

First let me say thank you to the people at Solarbotics (www.solarbotics.com) for putting my Magbot pendulum on their site.
Then on to current projects:at the moment I'm working on a hourglass with a wheel in the middle(the sand from one glass moves the wheel before falling into the other glass).Next will be a more standard hourglass,and then I might make another one,since all good things come in threes(or so they say).