🥢 Step 3: The Notched Crossbeams (Top Supports) (using popsicle sticks) Cut the Notches: Take two sticks. In the exact center of the long edge (the thin side), use scissors to snip a small "V" or "U" shape. Glue the Rails: Glue one stick horizontally across the top of the left pillars, and the other across the right pillars. Make sure the notches are facing UP. Position: Place them so the notches are exactly across from each other, about 1 inch from the front pillars. See more