Biggest Ideas: John Harington Inventor of the Toilet offers a roughly 28-minute, screen-free audio biography perfect for children ages 610, exploring how John Harington invented the first flushing toilet in the late 1500s, revolutionizing hygiene and sanitation. Through engaging narration and interactive elements, listeners build historical awareness, engineering curiosity, and vocabulary related to invention and public health. A fun quiz at the end reinforces memory, boosts critical thinking, and celebrates creative problem-solving. This card inspires young learners by showcasing how a clever idea can transform daily life and nurture lifelong innovation.