Measure and cut a square piece of paper. Use the ruler and pen to draw lines from each corner of the paper towards the center. These lines should be half the size of the length of the square— we used 2.5″ lines on a 5″x5″ square, but feel free to try different sizes! Starting from the corners, measure 3/8″ down the lines that you just drew and draw a small perpendicular line, about 1/8″ long, on the right side of each.

Cut along each line that you drew in step one. Be careful not to cut all the way through to the edge of the paper when you cut the small perpendicular lines!

Lift a corner and roll it over the top and to the left towards the adjacent incision. Tuck the corner underneath the adjacent slit and secure it by sliding it all the way down until the incisions intersect.
Repeat with the other three corners. If you have tape, reinforce the pinwheel by taping down the tucked parts on the back.

Push the tip of the skewer into the center of the length of the cork. Push the push pin through the center of the pinwheel and into the face of the cork. Leave a small amount of room for the pinwheel to spin! Wiggle the pinwheel around just a little bit so that the hole is large enough for the paper to spin freely.

Test your new pinwheel by blowing on it!