http://www.thisiscolossal.com/2014/0...t-caddisflies/
Artist Hubert Duprat Collaborates with Caddisfly Larvae as They Build Aquatic Cocoons from Gold and Pearls
There's all number of things that could be used to create an environment for the larvae. One I was thinking of would be small tiles with words and letters on them. We could see if they have anything profound to say.