Stick Together STEM Craft Stick Connectors 30mm

Heavy duty connectors for bigger STEM builds.

The Stick Together STEM Craft Stick Connectors 30mm are part of the 3DprintEDU Stick Together STEM Building System, a reusable classroom construction set that turns ordinary craft sticks into hands on engineering challenges.

This 30mm set is designed to fit 3 standard craft sticks, making it ideal for stronger builds, larger structures, bridge challenges, tower challenges, load testing, and more advanced classroom engineering projects.

Use them for building:

• stronger towers
• bridges
• frames
• 3D structures
• load bearing designs
• engineering prototypes
• geometry models
• collaborative STEM builds
• open ended design challenges

No glue. No tape. No hot glue mess. Just print, add craft sticks, and build.

What is included

This set includes the 30mm heavy duty versions of the Stick Together core connectors:

• Straight connector, for extending craft sticks into stronger beams
• 90 degree corner connector, for sturdy frames, squares, towers, and box structures
• T connector, for supports, branches, and reinforced builds
• 3 way corner connector, for cubes, towers, and 3D structures
• Multi angle hub connector, for creative open ended engineering challenges

Which Stick Together size should I use?

This 30mm set fits 3 standard craft sticks and is best for heavy duty builds, larger structures, towers, bridges, and strength based STEM challenges.

For lighter, faster builds, check out the Stick Together STEM Connectors 10mm, designed to fit 1 craft stick.

For everyday classroom builds, check out the Stick Together STEM Connectors 20mm, designed to fit 2 craft sticks for a strong balance of stability and print efficiency.

Great for

• Classroom STEM centres
• Makerspaces
• Homeschool STEM
• Bridge building challenges
• Tower building challenges
• Structure testing
• Engineering design tasks
• Design thinking challenges
• Collaborative group builds
• Load testing activities
• Advanced STEM bins
• Reusable classroom construction kits

Teacher tip

Print several of each connector and pair them with standard craft sticks for stronger classroom engineering challenges.

Challenge students to build:

• the tallest tower
• the strongest bridge
• a structure that can hold weight
• a freestanding sculpture
• a cube or rectangular prism
• a structure with reinforced supports
• a design that improves after testing
• a bridge with the longest span

The 30mm connectors are especially useful when students need more stability than a single stick build can provide.

Print notes

These connectors were designed for standard craft sticks. Craft stick thickness can vary slightly by brand, so you may need to adjust scaling slightly for the best fit.

Because this is the heavy duty version, these connectors use more filament than the 10mm and 20mm sets, but they are ideal when you want stronger builds and larger classroom structures.

For classroom use, print multiple copies of each connector so students can build in pairs or small groups.

Build the full Stick Together STEM System

This 30mm set is the heavy duty, 3 stick version of the Stick Together STEM system.

Pair it with:

• Stick Together STEM Connectors 10mm, for quick print single stick builds
• Stick Together STEM Connectors 20mm, for everyday 2 stick classroom builds
• classroom challenge cards, coming soon
• bridge, tower, and geometry expansion sets, coming soon
• classroom storage and organization tools, coming soon

Follow 3DprintEDU for more teacher designed STEM tools, hands on learning resources, and classroom friendly 3D prints.

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