One of my favorite parts of the haggadah I edited is the seasonal songs (about spring, not about Passover). It was originally intended for young kids, but it's still fun to sing them as an adult.
Is it really even Passover if I don't get to sing the Frogs song? The parts for kids are the best parts!
Dylan (who is almost 19) attended a Seder in Boston with my brother's family, and since my nieces are 4 and 2 he wound up reading the 4 questions as the youngest literate person at the table.