Pregnant HippoPolyus Roly Polys (Rolie Polie Isopods) by Pocket Pets 2 Pregnant HippoPolyus Roly Polys (Also called Potato Bugs, Isopods, or Pill Bugs) Females with 20-60 babies in marsupial pouch (usually born in 2-4 weeks.) Meant to be used with a Roly Poly Farm available on Amazon Do not use with Pocket Pet Habitats until after babies are born Perfect first pet for children