If you are starting to explore paper circuits as part of crafting with paper, you need to learn how to make curves with the copper tape. It is easy to do, but it takes a little practice. To make the tape look like a curve, start attaching the tape making frequent tiny folds to create the curve. Press each fold lightly to stick the tape to your surface. When you have the tape in place, it will have a lot of wrinkles. Use something with a smooth hard surface to press the wrinkles flat. I like to use a bone folder but the handle of a pair of scissors will work as long as it is smooth. Here is a short video showing how to make curves with both 1/8 inch and 1/4 inch tapes.