hi. we are really new to lizards. we currently have a tank that is about 3' long, 18" wide and 18" tall...eyeballing the size. we have a brown anole, a green anole, and a house gecko. what could we add to this tank, that would make it more lively? we have plants and things, but no activity. the lizards stay in the plants, and that's it. i'm assuming that it's partly because they're adjusting to the new surroundings, but would really like to add something that's willing to run around a bit. thanks for your help!