Today was my assigned day for #LightUpPopUptober 2026. Today’s prompt is “conceal.”
I made a little Jacob’s ladder orihon (folding book) that conceals two different variants of a hex panel pyramid with different colored LEDs.
While I do have some stills, it really won’t make any sense unless you watch it demonstrated in the video.
I shot some build video, but am pretty overwhelmed with work and projects right now. So, it may be a bit before I edit that into something coherent.
The two taps on the cover totally sold it.
Excellent build — looking forward to seeing hope you did it.
I saw this on YouTube and thought it would make sense to cross-post it here. Another nice paper and electronic build.
That is cool!
Popups & magic!! 
You do the coolest projects! Truly magical.
That is really interesting! I love your popup stuff!
that is a wonderful- pop up video!
amazing work!
what kind of led do you use?
Chibitronics ( https://chibitronics.com ) makes Circuit Stickers, which include LEDs and some effects and logic components. Those make it a lot easier to do paper electronics. Before they existed, one had to solder surface mount LEDs to copper tape.
I will try to get a making-of video edited together soon. In the meantime, you can see them in some of my other projects, including my light-up icosahedra:
… and last year’s light-up pop up card (starting at 4:41 in the video):
thank you for the details and the source, that is really cool! I really dig this.
I enjoyed the website of parts 
This is so amazing.