Fold a square piece of paper into a triangle multiple times (as you would for a paper snowflake) and cut patterns into the edges.
This is a popular decorative craft that uses a paper cutout of a ballerina and a folded paper "snowflake" as the tutu.
These are flat dolls with moving parts, great for play or storytelling. Tissue Paper Ballerina
To put together a paper ballerina, you can choose from several popular methods ranging from simple "snowflake" styles to more advanced 3D wire-frame figures. 1. Paper Snowflake Ballerinas (Quick & Easy)
This method creates a delicate, 3D figurine using a wire skeleton and paper napkins.