We found a Praying Mantis on the window at Grandma Cat's house and kept it in Lilly's hermit crab box for 2 days. We were able to catch loads of Japanese Beetles to feed it as they kept hanging out lazily on the basil plants. We also tried a cricket, a spider, a moth, and Grandpa Jim and Aleks found an Assassin bug that they put in the box. We finally got to see it actually eat when it caught the Assassin bug, but Grandma Cat scolded us for feeding it such a beneficial insect (Assassin bugs, she learned online, eat other pests).
Here's mommy examining the mantis: