I saw this garden project in a book titled "Trash to Treasures 1" by Leisure Arts. These stepping stones use mostly recycled items. The only item purchased was brick mortar. The bag cost me about $3.00 and I used 1/4 bag so the stepping stones cost just .75 for 2. The recycled items are: pizza boxes - I made a 13" and a 9" stone dry cleaner hangers dry cleaner plastic bags pebbles, tile, shells etc. You will also need: duct tape sand paper (optional) Cut off the top of the pizza box…