Money trees are a great option. I had a beautiful one in Beau’s cage.. until he was diagnosed with coccidia 😬 it has since made a gorgeous houseplant. I’m only going off of experience, but crotons, peperomias and pothos plants have worked the best in my cages. I’ve also used coroplast on Beau’s old XL Reptibreeze! I bought pre-cut 48” x 24 pieces.Went to Wal Mart today and they had a couple money trees that were close to 3 foot tall so I bought one. Much cheaper than my ficus that was 65.00 at the nursery! This money tree was only 24.97! I also bought a pothos in a hanging pot and I washed them really well and put them in Eustis cage with the other plants and the mass cane tree. Gives him a little more cover. He really prefers a lot of foliage he can hide in and when I took the ficus out he was at a loss! He was just constantly walking along his branches like he didn’t know what to do so I hope this helps.