One year, I prepared the names of the 15 parts of the seder, each on an 8-1/2" x 11" sheet of paper, with numbers and headings (there was an English translation as well, but it is too small to be legible on the scans below, so I deleted the English). Before beginning the seder, I set up the children with markers and colored pencils, and they illustrated one or more of the papers. The children ranged in age from 3 to 14. I then taped the sheets to the wall in the room where the seder was held, and we referred to them throughout the evening as we sang the order of the seder. This is an easy project to do, and has great pedagogic value.