Life/Form's $186 circumcision trainers "include the foreskin, glans penis, frenulum, meatus, and coronal groove" and are "made with our soft, lifelike material, which is pliable, delicate, and realistic to the touch."
More seriously, Life/Form sells a pretty amazing range of anatomical models for training and education, including a 1lb lump of fat (also sold by the ounce and the five-weight); artificial blood by the quart; gangrenous, ulcerated feet; lifelike bedsores; obese, geriatric head/torso mixes; jars of artificial earwax, and much, much more.
Infant Circumcision Trainer, White (Thanks, Fipi Lele!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.