Is this 3D model free to download?

Yes, Preassembled Secret Heart Box is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by emmett, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Preassembled Secret Heart Box 3D printable model by emmett

Preassembled Secret Heart Box

Source: Thingiverse by emmett

The Preassembled Secret Heart Box is a free printable 3D model from Thingiverse by emmett. UPDATE: I have new a much better version of this design here: I really enjoyed Eric Young's design of his Secret Heart Box, but I didn't relish hunting down all the required. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

10,183 saves Source: Thingiverse Updated 2026-10-07 License: CC-BY-SA · commercial OK 164 makes Category: Decor & Art

Tags: 3D, artistic, container, customizer, Customizer Challenge, openscad, parametric, preassembled, supportless, useful, valentine

About this model

UPDATE: I have new a much better version of this design here: I really enjoyed Eric Young's design of his Secret Heart Box, but I didn't relish hunting down all the required parts to put it together. One thing I learned from designing the Blossoming Lamp is that it's entirely possible to 3D print complex, preassembled mechanisms without breaking the 45-degree rule. I took it as a challenge to show that it's possible even with something as seemingly complex as this locking heart box. See the video here: UPDATE: By popular demand, I've modified the customizer code so you can now add words to the top of the heart. Make sure your valentine knows it's just for them. A big Thank You to the good people at Makerbot and the bot farm for printing 100 of these as favors for my wedding. It's good to h…

Frequently asked questions

Is this 3D model free to download?: Yes. Preassembled Secret Heart Box is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by emmett.
Who made this model?: Designed by emmett, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.