Pieces you need:
2 large rectangles
2 small rectangles
✔️ Step 1: Place the large rectangles on the floor on their long thin side. Make them parallel to each other with about 2 feet (24 inches) between them.
✔️ Step 2: Place the small rectangles the same way with the long thin side on the floor. Have it touch the large rectangle to begin to form two parallel rows of cushions.
✔️ Step 3: Place the semi-circle next in the rows touching the small rectangle.
✔️ Step 4: Using the small rectangles as your base, place an arch down. The arch will be the only cushion at this point connecting the parallel rows. Repeat with the second arch.
✔️ Step 5: Place the triangles down beside each semi-circle, standing on their side for maximum height.
✔️ Step 6: Finish the build by laying the playmat on top of the other pieces to create a roof for your tunnel.