Some things are difficult to illustrate and to inject with personality. Either they just are not cute or visually appealing (as with the South American Condor in my Girl from the Sky book) or they are very tiny, like the spider here and changing the normal dimensions of the creature can turn into a horror scene.
So Anansi who actually does not have features, like a pair of cute eyes to give expression or a mouth to talk with must indeed be animated. He is the main character and he is a trickster. I guess what I did to solve the problem was to use his "hands" all eight of them to tell the story. I really did study the actions of spiders to figure this out.