Terrariums are a great place to keep your little robotic friends. A tight fitting lid keeps them contained and out of trouble when you are not home. They don't like the humidity and may tap on the glass and cry at first. Just ignore their sad little faces and pitiful cries and they will settle down. If rust starts to form on their electrodes it can be removed with a stiff brush and a little WD-40 when you take them out on the weekend.