Went to a trade show in Coventry this week, The Sign Show had a stand with really cool t shirts that light up or flash. The one design acted like a graphic equalizer and the chest had graphics that went in beat with the music. Imagine walking around a club the your own T shirt in tune with the music.You can have anything designed and put on them. For an order of 500 or more and a price of £20 each (ex VAT) a walking flashing bill board could be yours.