- You cannot gauge if the holder will be the right size without the items drawn in, proportionately.
- You cannot tell if the product would work because there is no context to the holder. It is holding nothing.
- You will always have the illusion that it will work.
Need Help?
22 June 2025
Dog Note and Pencil Holder – From Sketch to 3D Print with Tinkercad
20 June 2025
Design a Snail Cup Coaster with Tinkercad with the "Sketch" Tool
SNAILS again
Here again I thought of snails when I begin tinkering with Tinkercad. Some things never change.

Something that was impossible for me in Tinkercad is now possibilities only limited by my imagination.
How to Design & Print a Clipboard & Pencil Holder with Tinkercad
What do you do with a clipboard?
You write.
What do you write with? A pen or a pencil.
Since I often draft my work with a pencil, I thought—why not make my own clipboard pencil holder?
Modelling the Idea
In the example above, you’ll see how I like to model my designs. I copy and paste each iteration as I go, partly to document the process and partly to save time—if I need an edit, a spare part or want to revisit an earlier design, it’s just a copy-paste.
It also makes for a clean presentation. You can easily follow the steps of the clipboard pencil development.
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Functional Iteration: Add a Grip Gap |
One of the key refinements was adding a gap to improve the pencil’s grip. Unfortunately the PLA filament does not have the elasticity to flex. And so I ended up with a full ring design.
Put to Other Use?
Interestingly, I also played around with placing it in different locations—on the side of the table, for example—where it worked surprisingly well.
Here’s where things got tricky.
The pencil slots were intentionally designed as hexagonal meant to match the cross-section of a typical pencil. I accounted for the exact dimensions of the pencil in my 3D model—but forgot about tolerance.
The 3D printer has a 0.4mm nozzle. That means it will print 0.2mm both sides of the printer head. As a result, the pencil didn’t fit, the hole was too small. After widening the hole by 0.4mm and more, it fit but was still a little loose.
If I were to redesign the slot, I’ll make it round.
Lesson Learned: Prototype the Pencil Slots First
Here’s a key insight from the process:
Next time, I’ll isolate and print just the part that holds the pencil—and do it in a range of slightly different profiles (round, hexagon, and so on) and sizes. That way, I will be able to test all the options at once and pick the best fit before embedding it into the full design. This will save filament, time, and frustration.
Your Turn
I hope you enjoyed this creation.
If it sparked your curiosity, why not try designing your own clipboard pencil holder? It doesn’t have to be based on mine—but feel free to borrow the idea and evolve it into something that fits your way of working.
And if you do, I’d love to see what you come up with. Share your designs with me!
12 June 2025
3D Printing in Design & Technology: Simple Classroom Projects That Work
3D Design and Print – Pencil Extender
Why buy something when you can design and print it yourself?
That was the question I asked when I first encountered 3D printing.
I’ve always enjoyed designing and making little things that work—objects with a purpose. From pencil holders to organisers for tools and stationery, I’ve built a variety of items to keep my workspace neat and functional. My making experience, until recently, had been grounded in traditional resistant materials using hand tools and machines. That changed when I started using 3D printing—not by choice, but by necessity (and I mean that in the best way).
At my current school, 3D printing has become integral to the design process, especially when fast, precise prototyping is required.
Rapid Prototyping
Rapid prototyping is a powerful strategy to test, evaluate, and iterate design ideas quickly. CAD/CAM technologies—once limited to industrial use since their emergence in the 1950s and 60s—have now evolved into accessible platforms for both professionals and hobbyists. Today, they sit at the heart of modern design education and rapid iteration.
Learning CAD/CAM
Coming from a traditional background, I initially found learning CAD/CAM challenging. I’ve always believed that before I can teach, I must first reach a respectable level of proficiency myself. But time rarely affords the luxury of long learning curves. So I did what any good designer would: I experimented. I failed, adjusted, relearned, and practiced again.
Now, I’ve grown comfortable enough to confidently use Tinkercad, a highly intuitive platform perfect for quick and simple designs. It’s not about mastering every feature—it's about knowing enough to think and act in the medium.
Examples of My Designs
Dollar Coin Holder Key Tag
A compact keychain attachment that fits a dollar coin—ideal for unlocking shopping trolleys without needing to fumble through your wallet.Reflection
I’m far from an expert in 3D design, and there are many advanced features I’ve yet to explore. But the deliberate hours I’ve invested—tinkering (pun intended), refining, troubleshooting—have all been worth it. Now, I can edit and improve student designs on the spot. Many of them assume I’m an expert. Maybe that’s good enough—for now.
One of the most rewarding moments in class is when a student sees their finalised design materialise—layer by layer—on the 3D printer. That moment of awe, when their idea becomes a physical object, never gets old. It validates the entire process.
Final Thoughts
I encourage every Design & Technology teacher and student to embrace 3D design and printing—not just as a skill, but as a mindset. Even if your national syllabus, like Singapore’s MOE D&T curriculum, doesn’t formally include it, there’s still space to experiment. Use it to make small components, product features, or even hardware substitutes you’d otherwise have to buy off the shelf.
Here’s to more designs, more prints, and more possibilities.
Go, go, go.
#DesignAndTechnology #3DPrinting #Tinkercad #CADCAM #RapidPrototyping #STEMEducation #ClassroomProjects #TeacherMaker #DigitalFabrication #ProductDesign #TechEd #HandsOnLearning #StudentInnovation #EducationTechnology #DIYDesign
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