Story Stones

I made up this set of story stones this weekend.  They were a lot of fun to make.  I envisioned a small set, but ended up with all of these.  I got a little carried away, because they were so much fun to make. I made them with Sharpie Marker.
The stones are supposed to be used as a story prompt, but I think I'll use them as a drawing prompt.
My plan is to tie up a few stones in a piece of colorful cloth.  Kids can choose a bundle, untie it, and make up a picture based on their stones.  I think there are enough for a whole class if the children partner-up. Could be a fun sub-plan, too.
What do you think?  How would you use them?