We have 2 lego mindstorm kits. We have RIS 2.0 and also Robolab 2.5 software. My daughter is trying to think of a science research project to do. She has 5 weeks to conduct the research. Does anyone have an idea of something that would be a good topic using Mindstorms? She is 17 and Junior in High School. I was thinking about testing different batteries including rechargeables to see which one last longer or is most consistend or has this been done before?