Crange is an acorn, the last acorn to leave his tree actually. He is selfish and not great at much except drinking. He is tasked to leave the tree and plant himself, as his brothers and sisters have done before him. We follow Crange as he dutifully neglects doing any of that and neglects growing up in general.
There may be blood and cursing, so I wouldn't recommend this to children. Also if cartoonish blood/gore bothers you, I would walk away as well.
