3D printing projects for kids
that they design themselves
The best first 3D print for a kid is one they design themselves and can hold within the hour: a keychain with their own name. Below are easy projects sorted by age, from 6-year-olds who pick a font and a colour to teens who model their own parts, plus the safety rules for the hot end.
By Philipp Baldauf · Updated September 29, 2026
Why a name keychain is the classic first design
Kids lose interest when the printer hums for three hours and the result is someone else's model from the internet. A name keychain fixes both problems: it's their name, they decide how it looks, and it prints in about 20 minutes, which is about as long as a 7-year-old will stand and watch the first layers.
It also teaches the ideas that matter later without a single lesson. A thin letter breaks, a thicker one doesn't. A bigger keychain takes longer. Two colours need a filament change. Once they've seen that on their own object, every other project goes faster. Schools use the same idea in the first classroom project.
Let them try it now
Designing is free and needs no account. Switch the base to Keychain, then try a few fonts together.
Ages 6 to 8: they choose, you print
At this age the fun is deciding and watching. An adult does the slicing and every step near the printer.
Name keychain
They type their name, pick a round font like Baloo 2 or Pacifico and choose two colours. About 20 minutes and 5 grams of filament. Tips for school bags on backpack name tags.
Door sign for their room
The same name, bigger, with an outline plate behind it. It takes 2 to 3 hours, so start it at bedtime and hand it over at breakfast. See door name signs.
Names for the family
One keychain each for siblings, grandparents or the dog. Kids love making something for someone else, and it's good practice at typing names.
Ages 9 to 12: first steps in the slicer
Now they can open the slicer, drop in their file and read the estimate. Keep the adult on the printer itself.
Two-colour keychain
Export a 3MF, add a colour change at the layer where the letters start, and watch the printer pause. A good lesson in how layers stack. The steps are in multicolor keychains without an AMS.
Keychain in Tinkercad
Build the same name keychain from shapes: a rounded box, a hole, text on top. It takes 30 to 45 minutes the first time. Follow the Tinkercad name keychain tutorial.
Pencil holder or phone stand
Simple shapes they design from a cylinder or a wedge, with their name on the front. Prints in 1 to 2 hours. They learn that walls and infill decide how strong a part is.
Play-dough cutters
A letter or a star outline, 10 mm high and 1.2 mm thick. Fun, fast and clearly a toy. Don't use them on cookies: printed plastic isn't food safe.
Teens: design, measure, fix
Teenagers can run the whole process, including loading filament and clearing a failed print, once they've done it with you a few times.
A replacement part
A missing knob, a clip, a cable holder. Measure with a ruler or calipers, model it, print it, adjust. The first real engineering loop, and it usually takes two or three tries.
Desk name plate
Name and a second line like a club or a year, in a block font, on a standing base. A clean project for their room. Sizes on desk name plates.
Something to sell
Keychains for classmates or the sports team. They learn cost, time and pricing. Note that selling prints made with NameSTL files needs the Unlimited plan, which includes commercial use.
CAD with code
OpenSCAD for those who like programming: a keychain whose length follows the name. Harder than Tinkercad, but it clicks with some kids like nothing else.
Easy 3D prints for kids at a glance
| Project | Age | Design time | Print time | Adult needed for |
|---|---|---|---|---|
| Name keychain | 6+ | 5 min | about 20 min | Slicing and printer |
| Door sign | 6+ | 10 min | 2 to 3 h | Slicing and printer |
| Two-colour keychain | 9+ | 10 min | about 30 min | Filament change |
| Tinkercad keychain | 9+ | 30 to 45 min | about 20 min | Account setup, printer |
| Pencil holder | 10+ | 30 min | 1 to 2 h | Printer |
| Replacement part | 13+ | 1 h and up | 15 min to 2 h | Checking the first print |
Print times are typical for a Bambu Lab A1 mini at 0.2 mm layers.
Supervision and hot-end safety
- The nozzle is about 200 to 220 °C and stays hot for minutes after a print. Teach "look, don't touch" from day one.
- The bed runs at about 60 °C. Wait until it's cool before a kid takes a print off; the part comes off easier then too.
- Hands stay out of the printer while it moves. An open printer like the A1 mini is easy to watch, and just as easy to reach into.
- Print PLA only. It smells little and prints at low temperatures. Keep the printer in a ventilated room, not in a small bedroom with the door closed.
- Small prints are small parts. Keep keychains and letters away from children under 3.
- Don't leave a printer running alone in a kid's room overnight. Put it where an adult passes by.
Honest limits
Kids under about 8 can't really design in CAD, and that's fine. Choosing a font and colours is design at that age. Pushing Tinkercad too early turns a fun hour into a frustrating one.
NameSTL only makes text, so it's the first step, not the whole hobby. Tinkercad needs an account; for kids under 13 a parent or teacher sets it up. For more ideas once they're hooked, see 3D printing ideas, and teachers will find class sizes and time budgets in 3D printing for teachers.
Questions people ask
What are easy 3D prints for kids?
A name keychain is the easiest first print: kids type their name, pick a font and colour, and it prints in about 20 minutes. After that, try a door sign for their room, a two-colour keychain or a simple pencil holder.
At what age can kids start 3D printing?
From about 6 they can design a name keychain with help. From 9 they can use a slicer and simple Tinkercad designs. Teens can run the printer themselves once they've done it with an adult a few times.
Is 3D printing safe for kids?
With supervision and PLA, yes. The nozzle is over 200 °C and the bed about 60 °C, so kids watch but don't reach in. Keep the printer ventilated and don't leave it running unattended in a child's room.
Can kids design 3D prints themselves?
Yes. With a name generator even a 6-year-old designs their own keychain in five minutes. Tinkercad works from about 9, with a parent or teacher setting up the account.
What's a good 3D printing project for a kids' party or club?
A name keychain for every kid. Everyone designs one in five minutes, and 8 keychains fit on one plate. For larger groups, see name keychains in bulk.
Which 3D printer is good for kids?
A small printer that calibrates itself, like the Bambu Lab A1 mini, is a good family printer. It's quiet and simple to start. Read the beginner printer review before you buy.