What fits in the palm of your hand, needs no batteries and produces fun, bite-sized animated promos? Flippies custom flip books . The clever little books are hot promotional items for companies as varied as Advance Auto Parts, Wells Fargo and the Nicktoons Network. They have been popping up as interactive brochures, new product announcements, tradeshow giveaways, collector’s items and direct mail inserts. Each book can be imprinted with two segments and covers, since only one side of the book is watched at a time.