You're not the only one who is excited about "Ratatouille!" I already have the Pez dispenser. (That's the only collectable I've seen for sale, yet, but I have a collection of toy rats, and he fits right in.) Thanks tons for the link to the "good stuff!" I am very happy that, finally, a movie is coming out with a hero who is a rat, and is, well...just a rat. Not a "pretty rat," not a "human combined with rat" (like the kinds in "Flushed Away,") and not a "cute cartoon rodent." I don't know his name, but I like him, because he's just a plain, average, grey rat. I, too, hope that more people will realize that rats are smart, clean, friendly, and good pets.
I wouldn't normally mention this without knowing more details, but I'm afraid I'll forget, and it just might turn out to be something good in your life. You mentioned that you have a 10 year old son with Autism, and that having a rat is doing him good. I am sure that you and your family have done tons of research into all aspects of Autism, and so, you might have already heard about this, or it might not be appropriate to your situation, but I'm going to throw the idea out there anyway.
There is a VERY good book out - and I'm talking to everyone here who likes reading, rats, or both - called, "The Curious Incident Of The Dog In The Nighttime." (Yes, the title is based upon a Sherlock Holmes novel.) The author is Mark Haddon, and the publisher of the hardback that I have is Doubleday.
The subject of the novel is a boy who has Aspergers Syndrome, a very specific form of Autism. On some levels, he is very high-functioning, and on other levels, he cannot function in the real world, effectively, at all.
Curiously enough, the boy has a pet rat named Toby, who makes his life much better.
I don't want to give too much away, but it's an inspiring read, and at the end, it leaves you with the message not to underestimate anyone.
Glad to have you, your son, and his ratties here!