i get them because they eat bugs in the garden & i just like them. this year i bought 20 pods. so far 6 have hatched. there have been some periods when i have not bought any but in the last 30 years i've probably released 40,000 or more mantids. you can find them online & even on e bay these days. if all 20 hatch & average 100 bugs that's 2000 bugs. even with that many i might see only 10 or 15 during the summer, usually in the fall. they recommend tying the pods to tree branches but i've seen the birds feast when they spot a hatch so i keep them in a vented jar & check them daily. i do find some pods on my shrubs & trees every now & then. i have a couple old chinese cricket cages. i on occasion will keep one for a while. i also catch katydids & cage them. they sing in the evenings.