Students are on the case—as they conduct hands-on investigations to solve mysteries using the power of science! Just select a folder…invite children to read the intriguing mystery story…then challenge them to use everyday items (not included) to complete the experiment and crack the case! You get 20 different folders—each with 5 copies of a mystery story, a step-by-step experiment and a teacher’s guide featuring background information, discussion questions and more. Folders measure 11".