For Valentine's Day last week the students in my regular psychology class were challenged to make hearts for their sweethearts (real or imagined) that fit three criteria: they had to include a part of the brain, the unit we were studying; they had to include the function of that part; and they had to fit the style of normal valentines. I'm posting some of my favorites here. What do you think? Which one do you love? And how do you tie holidays into your classes?