My lab purchased a 3D Printer. Two of my main motivations to get one were: 1) print 3D brains to give to volunteers; 2) print 3D brains for educational uses.
Here is a photo of three brains: on the left is a 26 week old preterm; in the middle is the same baby but at 41 weeks, around the age that most babies are born; and on the right is the brain of a 36 year old adult. It's amazing how similar the middle and the right brain are in terms of folds/surface (but not size). What do you think? What are some other uses for 3D printers for neuroimaging researchers and teachers?