Tillie is a friendly neighbourhood duck with a wonderful sense of humour and lots of friends. Tillie is so much fun to be around that her friends are constantly dropping by her place for impromptu play-dates. Tillie loves it when that happens, because then she can play her favourite game in the whole world — guessing who’s knocking on her door! As young viewers listen and play along, “Tillie Knock-Knock” introduces them to animal names and the typical sounds they make.