Illustrator Ed Harrington gives us IKEA-style instructions for building or conjuring movie monsters, specters, and villains! They include a list of parts and tools needed, although you probably won't get them all in a kit. Some include a warning that will be understood by anyone who has seen the movie.
See 26 of these horror (and not-so-horror) movie icons in a gallery at Bored Panda, and with his other artworks at Instagram.
Some of Harrington's designs are available at the NeatoShop!