Based on Cinderella by Barbara McClintock. Great for the entire class to work together to solve the clues or for smaller groups to solve individual clues. Each packet contains the objectives, clues, instructions on organizing the class, and preparing the room. There are no locks for the teacher to set or the students to open. Set-up time for the teacher is usually less than 15 minutes and the mystery can be solved within 30 to 45 minutes.