Thinking Tune by Arthur the T.V. Show Lyrics

I, the Brain, will now engage in my favorite entertainment.
I like to think.
Hmm. Aha
Huh.
Mm-hmm.
Hmm.
Hm-hmm. Ah. I like to think.
Hmm.
Mm-hmm.
Ahhh. That was very satisfying.