Things You'll Need
*Two sheets of construction paper
1. Fold the Blade
Cut one piece of construction paper into a square shape.
Fold one corner of the square over to make a triangle.
Fold one edge of the triangle over to make a smaller triangle. Unfold the paper, so you are left with the larger triangle and a crease in the middle.
Fold each short side of the triangle over so that it meets the middle crease. Repeat this step so that the paper becomes narrower and resembles the blade of a narrow knife. You may want to repeat more than once, depending on how narrow you want your knife.
Fold over the two pointed ends at the bottom of the knife blade. Crease the folds and unfold. Tuck the pointed ends into the slots to make a blade.
2. Fold the Handle
Cut a second sheet of paper into a square. Roll it lengthwise to form a tube. Flatten both ends of the tube by pressing with your finger.
Roll one end to form a circle and tape it in place. The traditional kunai handle has a circle at one end.
Tuck the other end of the handle into the blade and attach it using tape.