I'm wanting to plant some plants and/or bushes in Zephir & Kephir's pen for them to play and hide in. What are all ya'lls opinions on what to plant? I have loads of calla lillies that I've been thinking on transplanting... Are those safe for them? If not, what is and what do all ya'll think would make them happiest? 
Also I want a variety, as in some that are nutritious and some that are there for playing/hiding but don't hurt for them to do a taste test on if they want to.

Also I want a variety, as in some that are nutritious and some that are there for playing/hiding but don't hurt for them to do a taste test on if they want to.