Next time if you have cardboard, don’t throw them away. Cardboard has many uses. As a fact, people had created all sorts of stuffs from the humble cardboard. Furthermore, the tools required are not sophisticated. They are simple tools like ruler and cutters. You need tapes or glue to hold them together too.
Here is one video that shows you how to make geometrical bowl from card boards. First you need to cut a number of small triangles and joint them using tapes. You slowly built up from here until you get the bowl. The things you can made from cardboard are just endless.
Do you know you can buy cardboard sheets, for your projects.