SmartLab Challenge: 4th Grade Challenge -- Get on the bus and take a ride to the newest sensation in interactive learning! SmartLab Challenge game books are a fun and fresh way to get kids excited and eager to learn! With hundreds of questions covering all areas of their curriculum?language arts, social studies, art and music, science and math?and an interactive gaming component with which kids can challenge themselves and each other to hours of brain-building fun, the SmartLab Challenges are a unique and effective tool to teach kids what they need to know, when they need to know it.