Method of making concealed weapons

Tools/raw materials

Paper.

1. Prepare a square piece of cardboard and fold it into two corners, one side along the longest side and the other side in a straight line.

2. Continue to fold in half along the other side, fold in half again, disassemble the cardboard, and fold the second diagonal of the longest side in half.

3. Fold the middle along that side and continue to face it. Fold the longest side outward in the middle position, and then turn the other side in that direction.

4. After turning, continue to fold in half, then fold in half again, fold the excess part back, turn it over and fold it inside, and put the folded part in that hole.

5. Repeat the above steps and then fold two corners, and nest the folded three corners with each other, so that the triangular boomerang is completed.