Pieces you need:
2 large rectangles
2 small rectangles
✔️ Step 1: Find an empty wall to make your air chair.
✔️ Step 2: Stand the large rectangles on the floor touching the wall with the long thin side on the ground and perpendicular to the wall. There should be about 2 feet of space between the 2 rectangles.
✔️ Step 3: Bend your play mat into an L shape and rest it on top of the two large rectangles. The top of the L will be resting against the wall as support. The bottom of the L is the seat of the chair.
✔️ Step 4: Use the small rectangles as arm rests by placing them on top of the play mat seat.
✔️ Step 5 (Optional): For extra support underneath the chair you can put the semi-circle in the arch to form a rectangle and side those additional two rectangles under the chair to help support the weight.