So, of course, he had to have this big 20-sider when I saw it and for a reasonable price.
It arrived today and I introduced it to Wally. He took to it immediately (probably because it looks like a ball at first...and being purple doesn't hurt - easy for him to see), but then he realized it doesn't roll like a ball, but he can put his paws on it and stuff and it moves funny. He really liked it then.
His dreams of being a canine GM have to start somewhere.
Enter - Wally vs 20-side die. Hope you enjoy the video. Forgive the less-than-expert quality, please.
He picked it up on his own just from playing around with it. He might be a natural die roller dog.