Lucky for Sophie and Chloe, Grandma Tillie knows how to royally entertain her grandchildren. To their delight, whenever Grandma Tillie babysits, she seems to disappear, only to be replaced by a parade of lovable characters. There's Tillie Vanilly with the bright pink hair, star of The Tillie Vanilly Show, who loves to tell jokes and dance the conga; Chef Silly Tillie with the lampshade hat who offers up a dinner of Worm Chili with Glue Gravy; and Madame Frilly Tillie with the sparkly eyeglasses and towel turban, the world's most creative bath-bubble stylist. Sophie and Chloe wonder who will appear to tuck them into bed: Hiker Hilly Tillie, Explorer Chilly Tillie, or Zoo-lady Gorilly Tillie? To their surprise, it's the best character of all—just plain Grandma Tillie.