How would you feel if you became a millionaire at the age of 13? Sixth grader Rufus Mayflower, in “The Toothpaste Millionaire” by Jean Merrill, starts a company with his friend Kate MacKinstrey. Just one and a half years later of business Rufus becomes a child millionaire by creating and marketing a cheaper and better toothpaste. Kate MacKinstrey and Rufus Mayflower are the main characters in the novel “The Toothpaste Millionaire” by Jean Merrill. Kate moves from Connecticut because her dad’s