Improbable Research points to a "stop-motion history of microbiology" at YouTube. The video's producers, at Rev Men Studios, used Lego toys to animate the educational content. A character donning a monocle narrates the stories of Antony van Leeuwenhoek and Louis Pasteur. Upon discovering "animalcules" under his microscope, Lego van Leeuwenhoek says, "Hello wee beasties! I see you!"