For this simple idea you will need:
- Cardboard paper
- Small magnets
- Glue gun/strong glue
First, either cut a long strip (or any shape) and fold in half or fold the paper in hald and cut a shape.
Put glue on one of the sides of the magnet and glue to the bottom of the folded paper. Put the other magnet on top so you know where they meet and add glue and fold down the paper.
Let it dry and create all the shapes and sizes you want with the same method.