I kind of want to add that I have been experimenting with plants a few years back as well. But in my case the birds are better at destroying then the plants a growing. In the end I just ended up with very little damaged plants that had a hard time coming back.
If yours are not going to snip a beautiful full vine of leaves hoya's can be fun or marantha's. Also maybe a big spider plant? But don't let them dig in the dirt and make sure they are not treated with chemicals and organic.