Some ideas for using Lego Bricks

As I mentioned in my last post, I've been looking lately into using Lego bricks outside of the normal children's play.  
I've been working on getting together some ideas for my high school physics class, and here are a few I'd like to share:

• pressure - find the amount of air pressure exerted upon different Lego bricks (assume standard temperature and pressure at sea level)
• work - build an object out of Lego bricks and calculate the work it will take to move the object 1 meter
• trigonometry - build a right angle out of Lego bricks and then calculate the hypotenuse in terms of Lego measurements