What is the most wonderful thing in the world for a little boy? As long as he wants, he can stay in the toy store, eat his favorite food, and enjoy as many sweets as he likes, play cowboys and Indians - and of course, stay awake until he can no longer keep his eyes open. Little Niki is so lucky: at his grandma's, he gets to do all of this. And so much more. But a day that fulfills all wishes can also be quite exhausting. Even the prospect of vegetables and an early bedtime becomes tempting. In the sequel to "Grandpa is the Greatest," Sophie Schmid once again creates a charmingly humorous and detailed picture book that will surely delight not only the little ones but also their parents.