If I were a collecting type, I think I'd be going pretty gaga over the "Happy Set" prizes that come with McDonald's kid's meals. They really do look well-designed and better crafted than a lot of the cheap junk that kids get. Fortunately, I am not such a collector so I don't have to buy at least 8 "happy set" meals a month to try and collect them all (not to mention possibly having to trade pieces to complete sets).
The Despicable Me minions are a pretty predictable option since they are very popular right now. I keep seeing crafts including cupcakes and other food items shaped like them. The more curious option is the golden oldie of Tom and Jerry. I didn't know when the cartoon was last in production, but I figured that it was awhile ago. I did a little research and discovered that it's being rebooted by the Cartoon Network, but they're only producing two 11-minute shorts. My guess is that these toys are a cooperative effort between McDonald's and the Cartoon Network (which also airs in Japan) to promote the reboot and generate interest in the series.
Incidentally, when I was in Japan and still had cable, I did run across Tom and Jerry cartoons fairly often on the Cartoon Network during channel surfing. In fact, I don't like the cartoon much so I was always disappointed that it seemed to air so often. I don't know if it was popular or if it was just cheaper to air than other cartoons because licensing fees were lower. I have nothing against the characters. I just love cats and hate to see them repeatedly humiliated by mice (or birds, in the case of Sylvester and Tweety).