How tall is it? Who has more? How long until my turn? Learn about measuring units and pick the right tools with the Measure It! series. Striking photography and simple text take readers through fun, real-world measuring examples.. Simple text and color photographs describe the units and tools used to measure. Measurement is an essential life skill and its never too early to begin learning. Fun, real-world examples. For ages 3-6. 3-6 years. Grade PK-1