A friend of mine makes movies with killer dolls, I'd better link his site here:
http://dreamtownfilms.com/He sells shirts and mugs there too now, in case there may happen to be any seasonal gift buying occassions coming up where you live.
Best part is, no lame back story about why demons took the form of dolls, or ghosts possessed dolls or whatever. The movies just kind of assume everyone knows that evil dimensions are inhabited by dolls.