Here's how to make a colorful backyard playhouse (no sewing necessary)
Cut out the shapes, saving the triangles (shaded on the pattern) to line the tepee’s top edge. Remove the paper backing from the zigzags.
Place a zigzag along the top of each opening edge of the tepee as shown in the photo on page 126 and bond with an iron. Next, bond the small triangles (saved from zigzags) along the tepee’s top edge:
For the first row, lay seven triangles point to point and bond. Apply the second row of triangles (six) in alternate spaces over the first row’s touching points (see figure F).