A joyous celebration of the young and young-at-heart Tonight’s a special night. Robert is going to his first grownup party – a birthday celebration for Great-Gran Sadie, who is one hundred years old. Robert is so excited he feels like a firecracker about to go off. But once he arrives at the party, it’s hard to remember what to do when. “Don’t do that!” says Grandpa Jack. “Don’t do that!” says Uncle Phil. “Don’t do that!” says Cousin Sidney. But what will Great-Gran Sadie say? How Robert discovers an unexpected kindred spirit comes to life in whimsical pictures that perfectly capture what it’s like to be small in a world of adults. This is one party no one will ever forget.