A couple free ways to make flip books – PC: “Flipbook Printer is a program that lets you make your own printed “Flipbooks” from avi movie files using business cards. Makes a great present – have the kids send a flipbook of them waving hello to the grandparents, or send your loved one a movie of you smiling or blowing them a kiss. It’s the ultimate in low-tech movie making!” Link. For Macs try “Movie Flipper“.
HOW TO – Make Flipbooks