Montessori Sensorial: Mystery Bag

“This is the Mystery Bag.”

The Mystery Bag Lesson: Presentation I – One Bag Only

  • Open the bag and remove one object at a time, name it, and set it down forming a vertical line.
  • “Let’s put them back in the bag now. Would you give me the …?” Continue until all objects have been replaced into the bag.

  • Close the bag and insert your hand
  • Visually think about the object you are grasping in the bag: “I think maybe I am holding a…”
  • Remove the hand with the object in it. Hold it up for the child to verify.
  • Ask the child: “Now would you like a turn guessing what is in the mystery bag?”

The Mystery Bag Lesson: Presentation II – Two Identical Bags with Identical Objects

Take the objects out of one bag, then the other bag, name and pair them.

  • Leave one half of the pair out of the bag. Place the other half in the bag.
  • Reach into the mystery bag with one hand, grab an object, and point to the one on the table that you think you have found.


  • Place both halves of each pair back into their bags.
  • Reach into one bag, grab an object, identify it and pull it out.
  • Then reach into the other bag to find its mate.
  • Alternatively, reach into both bags at the same time and search for the same objects.



Marnie Craycroft

Marnie hails from Maine where she spent summers buried in sand and winters buried in snow. She is the daughter of a nearly four decade veteran of the public school systems. Teaching has always been a part of her life. She founded Carrots Are Orange in 2010.

Carrots Are Orange is a Montessori learning and living website for parents and teachers.

Marnie graduated from Wesleyan University in 1999 with a BA in Economics. She spent nearly a decade working in investment management. In 2006, she earned her MA in business from the University of Washington’s Foster School of Business.

Marnie moved to the west coast in 1999 and currently lives in Boulder with her husband and three sons. She is Montessori trained. Her work has been featured on Apartment Therapy, Buzzfeed, PBS Kids, BabyCenter, the Melissa & Doug blog, Huffington Post, and Besides writing, passions include running (usually after her three sons), photography, and outdoor adventures.

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