Gather the family and make your Christmas jolly with these bestselling festive knock-knock jokes! Lift the flaps for punchlines and surprises.Follow two children on a mission to deliver a letter to Santa.Knock, knock! Who's there?Sandy. Sandy who?Sandy Claus is who we're looking for.Will they find him before he takes off in his sleigh? Take a tour of the busy workshop where elves build and wrap toys, meet the reindeer, talk to the local penguins and polar bears, and go for a sleigh ride.This popular series has sold over half a million copies and is now refreshed with vibrant new art from Steve Bjorkman.