As odd as it sounds, it must be true. If you visit this site, you'll see what I mean.
If your kids have an interest in mantises, we have several books in our children's room collection including Monster Bugs by Lucille Recht Penner [E PEN] for beginning readers, and Praying Mantises [J 595.727 PRA]. There is also a delightful picture book by Kiyoshi Soya called A House of Leaves [JP SOY] in which a little girl hides from the rain along with a few buggy creatures.
In our adult section we have A Guide to Observing Insect Lives by Donald Stokes [595.7 STO]. Stokes lists mantids in the section on winter insects. The reason being that praying mantis eggs overwinter in hardened casings. You can easily find a case at this time of year. As a family project look for a case in the spring and bring it indoors to watch the little mantids hatch!