Rufus Mayflower is a sixth-grader who gets frustrated by the high cost of toothpaste. He decides to make his own for just pennies, and with the help of his friend Kate MacKinstrey, he starts a small business from his garage. Their homemade toothpaste becomes a huge hit, growing into a million-dollar company that challenges big corporations. This fun story shows how a simple idea, hard work, and smart thinking can lead to incredible success.