Toad hides from shells

We have picked up a couple of what were somebody's beachcombed shell collections at some house clearing auctions. I am cheap, so only grabbed them when they went for $2 a lot.
I like having some of the bigger natural shells as garden decorations and crush up some of the small ones to put in with my tomatoes.
There were these two big ones that have great weathering. I wanted to put them out but realized I could double up their use by making them into toad hides.
We have a creek at the south end of the property and there are frogs and toads about. I have been trying to make sure I have hides for them set up in most of my planting areas. Those had been done using terracotta pots that had broken but I though the shells would be nicer to look at and the light colour will keep them cooler.

I just used the metal cutting wheel and my dremel tool and cut doorways into them. I made sure to round of the edges of the cuts so they shouldn't be sharp enough to cut any delicate amphibians.