8O You made these hammocks yourself?
How did you make those?
I take two pieces of fleece, a little larger than the hammock I want to make, then sew them together on three sides. Turn them inside out, then tuck and sew the last edge.
I buy eyelets that you can hammer into place for the corners (in the sewing section at Walmart), then I put a large keyring through those and a snap hook, so I can put them in or take them out quickly. Simple pimple
For the hammocks that I make where they can crawl inside, I do exactly the same, but make them twice as wide so I can fold them in half. That way they can lie on top of them, or crawl inside. They've been very popular.
The fleece costs $4.44 a yard, from Walmart. You can also get roll ends at a reduced price, sometimes. I can make two of the folded hammocks out of one yard of fleece.
You should give it a go. It's very satisfying to make something that your ratties love so much.