I never fiddle with redstone mechanics. This could be a very simple request, but I'd still like some guidance on how exactly to go about doing it. The more dumbed down, the better.
I just want some kind of assortment where somebody can drop an item into.. something (a hopper?) and then have another item spat out at them.
More specifically: I'm making a cute turtle island in a survival server with friends. I want something so that they can "pay" iron ingots (or some form of "currency") to receive seagrass, which they can then use to feed the turtles.
Any help would be greatly appreciated!