This was a quick little project I did while I was waiting for some of my larger projects to dry. I made a few rocks. These are made out of nothing but toilet paper and Elmer's glue. I basically balled up some toilet paper and put it in water, squeezed out the excess water and shaped them. Then just rubbed Elmer's glue on them. I let it dry and then did it a couple more times. Once completely dry I painted them. I did experiment with a couple more using hot glue, but they looked terrible when done (the whole family concurred) so they went into the trash. They are light but hard and I was pretty happy with how they turned out. I plan on making a handful more. They should be good for avalanches and such.
Here are a few photos.
Edit: Now that I posted this, the photos don't make them look all that great. They look a lot better in real life. I'll perhaps try and update the photos later.