Fake Stones





Introduction: Fake Stones

Give your garden an extra touch with these light and fake stones made from foam and clay. It's also a fun project to do with children.

The stones are made from a material I call "sandy foam". A combination of expanding foam and sand. More explanation about the material I used for this stones, experiments with it and all the possibilities, look at my previous Instructables: Flexible And Light Stone Material.

Step 1: Clay Stone Shapes

As basis shape I clayed stone shapes with "Model Magic" from Crayola. Make little balls by rolling clay in your hands, then press to create a stone shape.

Step 2: Mix Ingredients

For the sandy foam I used flexible polyurethane foam of Douglas & Sturgess. I used 0.10 oz of part A, 0.30 oz of Part B and 1.30 oz of sand. Mix it for at least 30 seconds, and add little amounts of sands in between.

Step 3: Prepare Working Area

Cover your work area with sand so you can lay down the stones to dry without them sticking to the surface.

Step 4: Model Sandy Foam Around Shapes

Get some of the sandy foam in your hands and model it around the clay shape. It will be sticky, so wear gloves and in between you can sprinkle sand on your hands so the foam doesn't stick to your hands. It will also create a more sandy structure.

Step 5: Let Shapes Dry

Lay the stones down on the sandy surface. You can cover them with another layer of sand, to create a rougher structure.

Step 6: Decorate!

These stones match perfect with the flexible stone pots I made from the same material. Here's a direct link how to make the pots: Flexible Stone Pots.



    • Science of Cooking

      Science of Cooking
    • Trash to Treasure

      Trash to Treasure
    • Paper Contest 2018

      Paper Contest 2018

    We have a be nice policy.
    Please be positive and constructive.




    Shape the stone around a plastic container, old film can or prescription bottle and use it to hid a house key or whatever you need to leave for someone that is hidden! Maybe just a deep hole inside the rock (on the bottom of course) and glue a small rare earth magnet inside to hold the key in place?

    To ysabet: I'm a geocacher, too. I'm forever bringing home interesting-shaped rocks and making caches from them. One cacher just published a "spoiler" photo on my page for Noah's Ark, GC27N7P. It's not the best picture of my use of rocks but it gets the idea started. I picked up another great one today just inches from the GZ for a cache that I found. Since each natural rock is unique, they're perfect for the game. Cache on!

    These look great. Do you have an idea on the cost of materials vs. buying rocks?

    as another user said....with this, you can make things that you can't make with regular stone. If you just want rocks though, find a landscaping outfit or go to the river.

    could you use this in an aquarium fish

    you might want to shellac it or something to help keep the sand on and keep anything funky from the foam from leaching into the water.

    that's a good point. You have no idea what's gonna leach into the water from the foam or how the fish will react to it. It's best to seal it and eliminate the problem altogether.

    just don't use sand with salt on a fresh water aquarium

    NICE! I geocache, and this method would make some excellent cache hides; I'll definitely have to try it!

    Step one . Go outside and find rocks . Step two .........................