I have Botia kubotai and Golden Dojos in my snail-control tank. They are hilarious fish to watch and they co-exist peacefully with the rest of the fish. They are very sociable, you need at least 3 B. kubotai. 2 Golden Dojos will do fine. What snails?
B. kubotai hide a lot, while Dojo are all over the tank. I bet the kids will love them. You can get them at PetSmart.