I had some extra wire fencing and clear vinyl so a "Habitrail like" tube seems like a good way to confine them to one end of the porch and out of the way. It is 9 feet long, (~3 Meters) and has a wood bottom for them to run on. Within 15 minutes after building it, they started using the tube and have stayed out of the way. And, they are fun to watch as well. Maybe I should add a loft!