Step 7: "ninja castle" - made with tapes
Tapes, inside diameter = 3", width = 15/16" or/and 30/16" (see image)
Cardboard or Thick Paper
two 15/16" Masking Tapes + one 30/16" Duct Tape
Cut out a circle of cardboard matching the tape's profile. Stack the tapes and the cardboard circle in any one of five configurations shown in the image. Tape them together.