I originally was going to make her a brain hat such as this one, but she actually got a similar hat at her defense party. So I used my brain and thought of a different brain-themed project.
To make these slippers, I began with my favorite slipper pattern. Then I knit a super long I-cord (using this tutorial). For my I-cord, I used the 2 double pointed needle method with 5 stitches and size 6 needles. Then I sewed the I-cords on the slipper to resemble a wrinkly brain. As the wrinkles increase the surface area of the brain, it took a lot of yarn and I ended up going through all the pink yarn in my stash (3 different colors of pink). To make the slippers more durable and last longer, I cut pieces of suede fabric and sewed them to the soles of the slippers.