Today we finished our prototype of how our invention will look. We had to make half-cuts in the cardboard to make our long rectangular piece bend. I think our problem was that our long rectangular strip didn't quite fit. I think next time, we have to make our have-cuts closer together. That way it will touch the circles smoothly. The rectangular prism on the inside of our cylinder is a protection box. It will hold our arduino because if we didn't have a box for protection, when you leaned back, you would crush it. We need our invention to be as durable as possible because you will have a lot of pressure pushing on it.