I know foam is a better material, but a foamsmith I'm not. Quite frankly I find the thought of working with expanding foam terrifying and intimidating. I'm trying to build a waterfall and a basking hill with embedded rocks and I would know how to make it with clay, but last thing I want is something that could make him sick. What types/brands would you recommend using or avoiding, or is there another approach you'd recommend?
I was kinda worried about the humidity too, but he gets so stressed out with baths that I wasn't sure if even a dish with a bubbler in it would be worth a try