Large scale celebrating of the seven day and night African American cultural festival known as Kwanzaa is a fairly recent development in the United States - at least, as recognized by the media and the population at large. But to those of your Black relatives, friends and coworkers in the "know," the joyous occasion of singing, dancing, storytelling, gift giving and feasting is nothing new, and everything delightful. They'll get a big kick and good laugh out of the funny and fabulous Kwanzaa greeting card on sale here, featuring as it does the traditional, colorful, seven lit candles of the kinara and a pair of knowledgably humorous punchlines.