So I've had a sulcata tortoise for almost a year now, and we've been looking for a better-looking home for him- sort of like one of those dog crates that look like end tables and we've found one! It's a glass terrarium table with large holes for air, and it opens up for cleaning, feeding, and interaction. The only problem we've had is heating it. We need a way to keep it warm (our house is 68 degrees at night), but we don't want to see the cord or a heat lamp. Is there any way to do that? Maybe a battery-powered heating pad or something? (Just to be clear, the tortoise is small- he's not full grown.)