1. Cut out each disk.
  2. For 2-of-3 splitting (recommended), cut out the 3 white windows on the colored disk.
  3. For 2-of-M splitting, cut out all of the numbered windows.
  4. On both disks, cut two slits along the lines of the central cross.
  5. Attach the disks together using a split pin through the central cross. (The colored disk goes on top.)