Hi Zeus,
Wow, what an interesting niche! I really like the concept of your site. How fun. I used to LOVE getting the McDonalds toys.
One thing I noticed is that your homepage does not have very much content, it's mostly pictures. Since your homepage is the most important page for the search engines, you really want to have a decent amount of content using your target keywords. So I would build that up some more.
It would be great if you could develop some kind of header with fries, hamburgers, etc. so really convey your theme. I know you can't do that with SBI! (you'd need to use a graphic program) but I'm not sure the cows in the header convey fast food toys.
Good job.