Baylor: A set of multi-colored magnetic letters that children used in the
1970s and 1980s to learn the alphabet have provided neuroscience
researchers at Baylor College of Medicine, Stanford University and New
York University a clue to the role of environment in synesthesia – a
condition in which the senses are blended. About three percent of the population has colored-letter synesthesia,
a perceptual condition in which letters of the alphabet trigger color
experiences. For example, J might trigger the experience of green, or M
may trigger red.