Even 18-month-year-olds love Dr. Horrible's Sing-A-Long-Blog!
No word yet on if she felt the ending worked or not.
Still, I bet this little angel will be reading Marvel Adventures: Super Heroes, Marvel Adventures: Avengers, X-Men: First Class, Wolverine: First Class, Tiny Titans! and Super Friends in no time, once she gets past that whole "learning to read" hurdle.
(All of which are excellent books, btw, and great to buy and give to kids/hoard for the kid in you. Hulk with a giant dog! Mxyzptlk vs. Bat-Mite! Wolverine in therapy! Good times, folks. Pick one or more of 'em up, if you have the cash and are so inclined.)
Interesting story - a kid actually did come in when I was at the comic store this Wednesday. He looked at the rack, blinked and asked us where the comics for kids were. Luckily, the owner had an entire rack of comics like the above set up for such an eventuality, so I pointed him and his Mom at said rack. Ironically, however, the kid got frustrated with those selections and asked for books that were "both easy and hard". Eventually, he walked out the door with a giant-sized Sonic The Hedgehog Manga-style Digest. Heh. Kids these days.