Creative Ideas Needed?

This year is my last Social Studies Fair, and I would like to get i nto the fair. I've never been in the fair, and I've always wanted to be in it. My partner an I have been trying to decide what idea we were going to use as the basis of our problem. Our idea has to be something from the early 1900's to present, and it has to includa a report, board, and 3-D model. It can be anything from an asination to the Jonas Brothers. Does anyone have any ideas? It has to be original and be able to make a 3-D model based on the topic. Please help!!!!