Ada Twist, Scientist is a delightful picture book about an endlessly curious girl named Ada Marie who doesn't speak until she's three, but then asks 'Why?' about everything! When a mysterious, stinky smell fills her house, Ada uses the scientific method—asking questions, forming hypotheses, and conducting experiments—to try to solve it. The story celebrates curiosity, perseverance, and the joy of discovery, showing that great scientists can start with simple questions and a lot of imagination.