My kid went thought a phase of really liking "Brown Bear, Brown Bear." Probably about the same age. And I think you're right -- it's the anticipation of seeing

My kid went thought a phase of really liking "Brown Bear, Brown Bear." Probably about the same age. And I think you're right -- it's the anticipation of seeing what the next animal / color combination will be. Another one in a similar vein, which my kid liked, was "Here Are My Hands"