I have played with this simulation for 3 hours over the course of a week. I will definitely use this in my classroom to introduce gas law variables and kinetic energy. This simulation is easy to use but the students will need guidance in establishing the relationships between the variables. The attached worksheet helps the student focus on establishing the relationships between variables. Excellent simulation.
The worksheet has the greatest impact when used with Excel. The students can see the straight line relationships and can use the equation for the line immediately to answer questions in the worksheet. The help menu was a bit hidden for me. But I found it eventually.