I love teaching stop motion animation, and if we could, it would be great if we could have everyone in school bring in Lego while we are working on it. Lego are arguably one of the easiest way to make stop motion because they move slowly, easily lock into position, and with the addition of blocks you can make a nice variety of "things". Of course, I can't assume that everyone has enough Lego to make something. I have a large collection myself, but I don't think I am bringing all that into school! Anyways, here is a link to a collection of channels of video's done with Lego. There is even some about Slenderman!
6 Lego-Tastic Brickfilm Channels to Follow On YouTube