I teach a class on the neuroscience of sensation and perception, where I go over the sensory signals from the physical energy, to the method of transduction where they are turned into a nerve signal (i.e photoreceptors in the eye for vision, hair cells in the cochlea for hearing, etc.) through the neural pathways in the brain that process the signals at more and more complex levels. Also a lab class on cognitive science, where the kids replicate classic cognitive psychology experiments that demonstrate some fundamentals about the way the brain works, and then come up with their own simple experiments they can carry out in class and do they. Its kind of a nice class, because its usually their first exposure to actually doing any kind of hands on science, as opposed to passive learning.