Mikeasaurus of Instructables has posted instructions on how to make your own remarkably convincing head in a jar.
Start by creating, printing and laminating a cleverly-edited wrap-around portrait of someone’s head (preferably your own). The Instructable has instructions on how to make your own wraparound head photo, but if photo editing is not your specialty, don’t worry – one is available to download in the instructions on Instructables. It needs to be fully laminated (you can buy self-adhesive laminating sheets at Amazon, or at Staples or a similar office supply place, or at Walmart) so that the paper is waterproof. Then, just twist it into a tube and submerge it in a jar full of dyed water.
via Laughing Squid