Here's a novel way to ensure everyone's participation at the Seder. Nobody's attention will wander after you pull out little plush representations of the 10 plagues out of their bright yellow bag. Blood, Frogs, Lice, Wild Beasts, Diseased Cattle, Boils, Hail, Locusts, Darkness, and the Death of the Firstborn (sensitively portrayed so as not to frighten children) --- all ten plush plagues fit snugly inside the plush carrying bag.  A bright red drawstring keeps the bag tightly closed.