An infinite string farm is a Minecraft contraption that generates an infinite amount of string. String is a useful item in Minecraft, as it can be used to craft a variety of items, including bows, fishing rods, and tripwires. Traditionally, string is obtained by killing spiders or by trading with villagers.
An infinite string farm takes advantage of a game mechanic that allows sheep to drop string when they eat grass. The farm works by trapping sheep in a small area and then placing grass blocks around them. The sheep will eat the grass and drop string, which can then be collected by the player.