Next semester I will be taking Experimental Physics II. The gist of the class isn't to do an experiment per se, but to build a device which could be used in an experiment in Experimental Physics I. In the past, students have built things like an inverted pendulum, a magnetic pendulum, and a magnetometer. I'll need to come up with an idea soon so I can apply for the $1k grant. I have two ideas so far; one is a bubble chamber, and one is a Stirling engine. The former sounds much more interesting to me and maybe better for someone who isn't an engineering type (I'm majoring in computer physics, and would like to go to grad school for particle physics). Anywho, does anyone have any other ideas?