Do you like solving puzzles and mysteries? Then this set of slide strips is for you! Here's your chance to solve 24 microscopic mysteries. Use the clues, along with you imagination, to discover what is shown in each picture in this set. Includes four slide strips with six photographed specimens per strip, plus an informative fun-to-read guide. For use with our Investigatorr Slide Viewer or Quantumr Big Screen Microscope.