Syrinx is a syringe substitute for kids. The designers think that, by making them look like little animals with needles coming out of their noses, they are making syringes kid-friendly. Because, you know, blood sucking animals are so cute:
When they are done, the doctor can give the detachable animal to the kid, so they can keep reliving the moment when the-bad-man-in-the-white-lab-coat took a glass of blood out of their bodies in the comfort of their own bedroom.