The simple subject is obviously kittens.....
I'm guessing the central idea of "the value of music that tickles the brain" is that music makes you smarter, increases IQ level, makes language development smoother, enhances creativity, and increases the reactions in your brain to work faster. Music has many benefits and these are just a few. You can always also just research on the topic of music effects on the brain online. Hope it helps!
Despite what is depicted in popular culture Frankenstein is the name of the creatures creator.
It shows that King is optimistic in the face of a very large task.