Nellie the sea otter stacks cups at Point Defiance Zoo & Aquarium [x]
I saw these otters in person! They’re so cute. :)
It’s not that she stacks them that interests me, but that she figures out how to stack them properly. When she realizes that the red cup won’t fit in the purple, she takes it out and reorders them. That’s problem solving right there. Not a lot of mammals could figure that out.