You are thirsty all of the time. Maybe you are exercising a lot or spending a lot of time in the outdoors. You feel tired during most of the day. Perhaps you are not getting enough sleep at night. However, if you have these symptoms you may also have juvenile diabetes. The only way to know for sure is to have a doctor do a blood test. Many children who have juvenile diabetes have a parent who has the adult-version of the disease, but just as many children will develop juvenile diabetes when no one in their family has it. Treatment of the disease is critical to leading a healthy life. This series, titled "First Facts. Health Matters," presents simple brief explanations about how things that affect the young reader happen. Each title contains a hands-on activity that illustrates the principles discussed in the book or gives additional information. The glossary contains all the words that are in bold print throughout the text. An index and suggestions for further reading are included. This publisher maintains a web site, facthound.com, that directs children to resources chosen for age appropriateness. Each selection of resources is identified by typing in the book ID. Resources selected are then specific to age and the subject of the title. This management of resources is particularly helpful for this age group. All titles in this series have the same resource management page, and all titles are recommended for elementary classrooms and media collections.