Abstract: A message display system comprises a bumper sticker kit including blank bumper stickers and sets of alpha/numeric display members. Each blank bumper sticker comprises a front display surface having registration indicia formed thereon and a back surface comprising an adhesive layer which is normally covered by a backing sheet. Each set of alpha/numeric display indicia includes a plurality of letters, numerals, etc. each comprising a front display surface of contrasting color relative to the front display surfaces of the blank bumper stickers and a back surface comprising an adhesive layer which is normally covered by a backing sheet.In the use of the invention, a message is formed on the front display surface of each blank bumper sticker by removing selected alpha/numeric display members from one of the sets and applying the display members to the front display surface of the blank bumper sticker in accordance with the registration indicia thereon.