Minecraft wiki entry for Snow_farming, associated text: On Bedrock Edition snow layers can be broken by moving a block or piston head into the space occupied by snow layers, dropping snowballs. A simple fully-automated farm can therefore be made using a snow golem to create snow layers, breaking those layers using pistons and collecting the snowballs via hoppers. It is also possible to create a semi-automated snow block farm by pushing the snowballs into the player inventory, using a dropper, where they can be easily crafted into snow blocks as the farm runs.