Aside from the usual divrei torah, treats, and stories, which are great, there are always those hands on touches that make the seder that much more exciting. It’s kind of like years ago when the schools used to load the kids with information, and then the really great rabbeim started utilizing hands on demonstration techniques and the kids experienced the lessons rather than just hearing them. The difference is night and day.
One friend puts up a giant poster of the pyramids surrounded by endless dessert to bring home what mitzrayim was like. Another has all sorts of representations of the esser makos on display as well as acting out. Some people march around with bags of matzos as if they are leaving mitzrayim. What special touches do you use to make the Seder come alive for your kids?