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Extensible Arithmetic Spinner, Math Spinner, Math Wand, Snap Spinner

Creation quality: 5.0/5 (1 vote)
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3D model description

Arithmetic Spinner, Math Spinner, Math Wand, Snap Spinner, Extensible

The math spinner does not teach. However, it might motivate children to think about mathematics and ask questions such as “What does that mod thing do?” or “Is it okay if I say 5 + 3 > -20?” It could be used as a random problem poser.

Children like problems that are tangible. Using snapping structures, I have figured out a way to make an extensible arithmetic spinner or math wand. There are four types of rings, each of which is 25mm in diameters and 10mm wide:

Digits (0-9),
Arithmetic operators( +, -, ×, ÷, mod). Modular arithmetic is an important idea. It simply means keeping the remainder. For example, 15 mod 7 = 1 .
Relational operators (=, ≠, <, ≤, >, ≥)
Signs (+, -, blank/unsigned)
Cap 1, optional.
Cap 2, optional.
One can print multiple sets, mix and match, and create very long number sentences such as ### × ## = ##### or ## × # + # = ###. The end caps are optional.

Please be very careful not to hurt fingers when snapping rings together. Gloves are recommended. To remove a ring after assembly, please use a flat-end screw driver and slowly pry it off. Have fun and help kids do some math!

3D printing settings

Printer Brand:












Please use a higher resolution. 0.15 mm works well for my prints.

3D printer file information

  • 3D design format: STL Folder details Close
    • Cap1.stl
    • Cap2.stl
    • Digits0-9.stl
    • Operators.stl
    • Relations.stl
    • SignPlusMinus.stl

    Learn more about the formats

  • Publication date: 2018-03-05 at 12:54





STEAM educator, learning from and working with K-12 STEAM teachers to explore new ideas of teaching and engagement. I firmly believe ART is at the core of STEM learning or all human learning! I owe my ideas and designs to the hundreds of K-12 children and teachers and university professors I have had the pleasure of working with, in multiple disciplines-- math, science,engineering language arts, social studies, early childhood education and more! All mistakes, of course, are mine! There is no warranty or liability whatsoever implied or explicit behind the designs or ideas. They are all posted for their potential educational values.

When working with children, please strictly observe all safety and health procedures! Please refer to the NSTA safety guides:


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