Sprouts

They would spawn in the grassy areas of the overworld they would have sticking up out of the ground a little stem and leaves when the player approaches them they fly up into the air try to go above them before going down into the ground again if they're above the player and hit them on their way down the player will take minor damage these things will have low health and deal low damage and upon being defeated they will drop a couple random seed type and/or a couple random sapling types. Thank you for your time and listening to my idea and making Minecraft better every day.