This is a heartwarming picture book about making mistakes, owning up to them, and asking forgiveness. Every party has a troublemaker. You may not have wanted one, but they inevitably appear. What should you do? You can try to engage them in a game, but they might lay down on the blue dot you needed. Or, you can offer them a cake, but they might stick their booger-filled finger into the layer you were most excited to eat. The best solution is to party harder. But until things get too far, it might be time to apologize. Jennifer Gray Olson tackles complex SEL (social and emotional learning) themes with expertise, grace, and humor in Party Pooper. (This book may contain a sharpie mark on the top or bottom edge and may show mild signs of shelfwear.)