Step 1: When your relatives walk through the door, nonchalantly take each one of their pictures with your digital camera.
Step 2: Quickly print each picture with your cheap, little photo printer, being very careful not to tell them why you are doing this, lest they try to escape.
Step 3: Feed them well so that they are too full to run.
Step 4: Quietly clean the dinner mess off of the kitchen table.
Step 5: Wake them all up from their after-dinner naps and drag them kicking and screaming back to the kitchen table.
Step 6: Get out all your scrapbooking stuff.
Step 7: Force them to make their own pages.
Step 8: Enjoy your completed scrapbook.