Build a digital 3d model
Use simple free software to design and build a digital 3D model of a toy, learning basic shapes, measurements, and simple modeling tools safely.
About this activity
Use simple free software to design and build a digital 3D model of a toy, learning basic shapes, measurements, and simple modeling tools safely.
What you need
Step by step
- 1
Step 1
Draw a simple sketch of the toy you want to make showing its main parts and the size.
- 2
Step 2
Open your chosen 3D modeling software in a web browser and sign in to your account.
- 3
Step 3
Create a new design or project to start with a fresh workspace.
- 4
Step 4
Set the modeling units to millimeters or centimeters in the software settings.
- 5
Step 5
Drag basic shapes from the shape library into the workspace to represent each main part of your toy.
- 6
Step 6
Use the scale or resize tool to change each shape to match the sizes in your sketch.
- 7
Step 7
Use the move and rotate tools to position the shapes so they line up like your sketch.
- 8
Step 8
Select shapes that should be one piece and use the group or combine tool to join them.
- 9
Step 9
Add details by placing small shapes or using hole/subtract tools to cut out parts.
- 10
Step 10
Export your model as an STL file or take clear screenshots to show your toy.
- 11
Step 11
Share your finished creation on DIY.org
Fun facts
How do I guide my child to design a digital 3D toy using free software?
Start by choosing kid-friendly free software like Tinkercad or SketchUp Free and make an account. Begin a new project, add simple shapes (cubes, cylinders, spheres), and use move, scale, and rotate tools to combine them into a toy. Use ruler and snapping to measure and align parts. Group objects to make solids and hole tools to create openings. Save often and export as STL/OBJ if you want to 3D-print. Supervise online access and teach basic file management.
What materials and software do we need to build a simple 3D model of a toy?
You need a computer or tablet with internet access, a child-friendly free 3D modeling program (Tinkercad, SketchUp Free, or similar), and a mouse or touchscreen. Optional: a 3D printer or a print service if you want a physical toy, headphones for tutorials, and a small ruler or the real toy for reference measurements. Ensure the browser is up-to-date, create a user account with parental consent, and have a safe workspace free of distractions.
What ages is digital 3D toy modeling suitable for?
This activity suits different ages with adult guidance: ages 5–7 can start simple shape play with heavy supervision, learning basics of shapes and moving parts. Ages 8–11 can model simple toys independently using snapping and measurement tools. Teens (12+) can explore more complex modeling, constraints, and exporting files for printing. Adjust task complexity, give step-by-step demos for younger children, and supervise online accounts and file sharing for safety.
What are the benefits, safety tips, and fun variations for kids designing 3D toys?
Designing 3D toys builds spatial reasoning, measurement skills, creativity, and basic engineering thinking. It reinforces math and problem-solving while teaching digital tool use. For safety, set time limits, use kid-safe accounts, supervise sharing or downloads, and check exported files before 3D printing to avoid errors. Variations: create design challenges, seasonal themes, or collaborative family projects. Combine digital models with hands-on crafts or paint a printed toy for mixed-media fun
Watch & Learn
Need help?
What can we use if we can't sign into the web-based 3D modeling software mentioned in step 2?
If you can't sign into the browser-based software in step 2, use another free web app or an offline CAD program that includes a shape library and lets you export an STL or take screenshots as in step 10.
My shapes won't line up when I use the move and rotate tools in step 7; how can I fix that?
If shapes won't line up after using move and rotate in step 7, switch units to millimeters/centimeters from step 4, enable grid snapping or enter exact positions/angles, then group/combine in step 8.
How can I adapt this activity for younger or older kids?
For younger kids focus on steps 1, 5, 6 and 7 (sketching, dragging basic shapes, rough scaling, and moving), while older kids should set precise units in step 4, add details with step 9's hole/subtract tools, export an STL in step 10, and share on DIY.org.
What are simple ways to personalize or extend our toy design after we finish the model?
To personalize and extend the toy, add small decorative shapes in step 9, design snap-fit joints with hole/subtract tools for physical assembly, export the STL in step 10 for 3D printing, and post photos and notes on DIY.org.