You can also do this with praying mantises, but they come as an egg nest. Put them under some leaves and a week or two later baby mantises everywhere eating all

You can also do this with praying mantises, but they come as an egg nest. Put them under some leaves and a week or two later baby mantises everywhere eating all the bad things. After a couple months there's always a few big ones that stick around. Surprisingly intelligent and curious little things.