Used in almost every country in the world, the metric system is an easy-to-use way of calculating length, distance, weight, and volume. Look at the label of a soft drink. You’ll see both ounces and milliliters or gallons and liters listed. For kids who love to interact with their environment and measure and build things, knowledge of the metric system is a must. Filled with do-it-yourself activities, bright illustrations, and valuable kid-friendly information on how to convert inches into centimeters, pounds into kilograms, and much more, this latest from trusted STEM creators David A. Adler and Edward Miller will have kids thinking in metric in no time. Each book includes a ruler with metric and imperial measurements that can be cut out from the jacket flaps.