most pet stores will give you snails, if not for free they will give you like a dozen or two, maybe even three depending how many are infesting their tanks, for only like 50 cents maybe a dollar. then you get a goldfish bowl like i did, put most of them in there with a little bit of an algae wafer and let them lay their eggs. not too long after you will have your own snail farm and you dont have to worry about finding a pet store with some because for the most part, unless they are big in plants, not all stores will have those small snails and you will have to take other measures to get their teeth trimmed. and eventually probably have to do it yourself if they go long enough without that hard shelled food.