PHOENIX (AP) — They’re not fluffy, they don’t play fetch and they certainly don’t roll over. But there is such a thing as a lap tortoise. What’s more, pet tortoises can wag their tails, will plod on up to greet you and some can even recognize their own names. The surprising warmth of this ancient cold-blooded creature has made them popular pets for families with pet dander allergies and for retirees. Tortoises sleep through the winter, a process known as brumation in the reptile world. They need a cozy den to keep them safe and warm. In the wild, they dig it themselves. Human-made burrows can be built out of large PVC pipes, plastic garbage cans or some cinderblocks with WonderBoard as the roof.