I believe that this idea would be great to use for plants in pots, however, I'm worried about using it outside in our gardens. Too much of the product would wash away and end up in the environment. I do love the idea to use in household plants to add some more vibrancy in our lives.
I really love how this looks. Kinda looks like a marbled countertop, only recycle style. I think that the more colors you use the better it'll become. Just a nice reusable mosaic. I think if this product is safe to handle food and to children long term, I think it would be cool in elementary school classrooms. Way to go!