Encouragement of Climb consists of 12 episodes each clocking in at 3 minutes. Usually anime shorts like this consists of little sketches that are either comedic or fan service-y in nature. It's very rare that a show can contain the storyline within that amount of time and still be a proper one with arcs, character development and plot. It also highlights the beauty of the locations mentioned (mt Takao specifically) and pays attentions to the details of both the climbers and the trail. I can't believe this also counts as a point but it allows children to be just that, children. They look like kids,act like kids AND they don't suddenly flash their panties or get over sexualized when they're KIDS. I feel like 99% of all recent animes can learn from this.