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Mystery Matter Box

Mystery Matter Box

28 total reviews

A box of interesting items with info cards. Items could include fossils, minerals, interesting materials, scientific tools, pure elements, experiments, and more. 

If you order multiple boxes in the same order, we'll include different items in each box unless you specify not to.

Hoping to get specific items in your box? Leave a comment in the box in the shopping cart and we'll accommodate whenever possible.


Matter is our monthly subscription box. It is currently one of the top science boxes available. Most months we have extra items and we offer a random assortment of these items here to anyone who may be curious about what to expect in the subscription.

Please note: This listing is for a one-time box of an assortment of items and NOT a subscription. If you're interested in subscribing to Matter to get new, fresh items shipped to your door every month, you can find out more here.

    Regular price $39.95
    Regular price Sale price $39.95
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    Scientific Modules |

    Customer Reviews

    Based on 28 reviews
    B.F. (District of Columbia, United States)
    Fun Stuff, thanks!

    I love a good mystery box, and I was really pleased with what I received. Thank you!

    R.A. (Virginia, United States)
    Gift for Dad

    I bought 2 boxes together vice the subscription and was thrilled to see there weren't duplicate items. Dad was happy with his new trinkets and fun facts.

    W.B. (California, United States)
    Fun Filled Box

    A wonderful purchase and a great gift for any science lover.

    V.R. (Oklahoma, United States)
    Mystery Matter Box

    My brother loves science and he absolutely loved these boxes. I bought two of them and both had different items and cards explaining what each thing was

    S.M. (Georgia, United States)
    My Daughter’s Favorite Christmas Present!!

    Fun packaging, good variety, loved the info cards!

    E. (England, United Kingdom)
    Such a great gift

    We ordered a mystery box but specified it was for a boy who is obsessed with the periodic table and the elements and we received a box with all elements in it! It is amazing and I'm sure he will absolutely love it.


    We only list 100% verified authentic items. We work with reputable collectors, and regularly consult with our network of scientists and experts.

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    You deserve better than craft store science products. And we think learning is more impactful when you're holding a tangible piece of what you're learning about. That's why Stemcell exists.

    We're dedicated to providing the best scientific products available—whether they're fragments of scientific importance, experimental activities, or just interesting things that scratch your curiosity itch.

    With every new product launch, our list of new ideas gets longer rather than shorter. So check in often for our latest projects, and thanks for being a part of our endeavor to make the world a smarter place to live.

    Believe in yourself; for everything else, there's science.