A female praying mantis sits on a leaf... Credit: MABONA ORIGAMI / CATERS NEWS ...a Phalacrognathus muelleri, or rainbow stag beetle, crawls across the floor... Credit: MABONA ORIGAMI / CATERS NEWS ..

Kids swallow a lot of batteries. But now MIT researchers are developing swallowable origami to fish the nasty foreign objects out. [Narrator] Welcome to a pig's stomach, well, a model of one at least.