Your favorite wizard is back, and ready to explore the invention of length, weight, and volume measurements. How tall is Moonbeam, the unicorn? How long are the whiskers of Jello, the cat? And just how heavy is that darling hog? Tons, and teaspoons, and ounces, and feet, and yards, and miles — what a headache! With millions to measure, wouldn't one standard system be simpler? Measuring has never been such a blast.