I had one years ago,few inches long,made out of wood,was shaped like a trumpet,was a cracking call,but i lost the fecker!!!
Another good one is the squeak out of a dog toy,take it out and cup it in your hands to make different pitches
yea we tryed that ,use to be a dog toy ,small rugby ball cut 1 end off and blow ,brilliant and cheap,poundlands the new fox call seller,