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Magic box pen vanishing

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PALM

@PALM

A magic box that makes part of the pen vanish.

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Updated at source: Sep 22, 2026

Model information

Source: Printables
Category: Other 3D Objects for Learning
License: Creative Commons — Attribution

Details Files (8)Makes & comments (Makes: 0) (Comments: 0)Remixes (0)Collections (4)

Magic box

This box creates an optical illusion when a pen is passed through the middle hole. You would expect to see the pen through the side opening, but an arrangement of mirrors inside allows you to see through the box without seeing the pen.

Working principle

8 mirrors correctly arranged in a box alter the path of light, allowing you to see through the box while hiding the central part (see the picture below).

Print Setting

No specific print setting required

No support needed

Bill Of Materials

1x Magic-box (3D printed)
1x Magic-box-cover (3D printed)
8x Mirror tiles 16mm x 16mm x 1.2mm
Reference of the mirror tiles I used (Switzerland only I guess) : https://www.galaxus.ch/fr/s5/product/creativ-company-mosaique-miroir-autres-fournitures-14078524?utm_source=app&utm_medium=referral&utm_campaign=pdp

I did not find the corresponding reference on Amazon but the closest one is ~20.5 x ~20.5 x ~1mm :https://www.amazon.fr/PH-Pandahall-Carreaux-Auto-Adh%C3%A9sifs-Acrylique/dp/B0D31TK5MT/ref=sr_1_124?sr=8-124&xpid=GV7iiMzOYnrX0

(I made a 3D files available for the Amazon mirror tiles, but I haven't tested it since I did not have these mirror tiles, any feedback would be appreciated so I can update the model)

If you find other mirrors tiles dimensions do not hesitate to modify the step files or ask me to upload an updated model for a specific mirror tile size.

I made the F360 model available and the mirror size are in the parameters.
If you update the mirror tile size in the parameters, the box shape will be automatically adjusted.
You may encounter issue with the wand and the stars on the cover, but these are only cosmetic.

Assembly

Glue the 8 mirror tiles inside the 3D printed Magic-box, be careful to not put glue on the mirror reflecting side. The mirror must be ultra clean otherwise the illusion loose in realism.