Did you ever play Hungry Hungry Hippos? If you can't remember, then you might have something wrong with your Hippocampus.
According to Wikipedia this "is a major component of the brains of humans and other mammals. It belongs to the limbic system and plays important roles in long-term memory and spatial navigation. Like the cerebral cortex, with which it is closely associated, it is a paired structure, with mirror-image halves in the left and right sides of the brain. In humans and other primates, the hippocampus is located inside the medial temporal lobe, beneath the cortical surface."
I can remember playing this game with my sister and younger brother and I know I enjoyed it.