Synesthesia—seeing sounds, hearing colours: One of Lynne Malcolm's favourite programs

For some people the number six is red and music evokes a range of colours and shapes. Seeing sounds and hearing colours is one type of synesthesia—where the senses are crossed.  Meet an 11-year-old girl who was surprised to find out that not everyone sees colourful auras around people, and who feels that numbers have colours and personalities.