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:
sand paper (optional)
Cut off the top of the pizza box.
The best consistancy of the mortar is slightly thick. If your mix is too thin your decorations will sink, if it's too thick they won't stick when the mortar is dry. Pour the mortar into the boxes, smoothing it out with the back of the shovel.
I used leftover tile and pebbles from our patio and yard.
Using a stiff scrubber I cleaned off each of the tiles and stones, then used a damp cloth to wipe everything clean.