Last year I made a camera out of a cracker box for Andrew Bartram after he got emotional several times on the Lensless Podcast about Paolo Gioli and followers taking pictures with the holes in crackers. I even tried to opacify a soda cracker and made a separate mount for one of it's holes in case he wanted to recreate crackerhole photography. I never tried it and Andrew accidentally crushed it while unboxing. It had been in customs in East Anglia for a couple weeks so probably wasn't still too fresh.
Still inspired by that and by YouTube Chateau and Convent restorer Billy Petherick's tag line "Crack on," this spring I made The Crackon out of a box of Wheat Thins. I speculated at that time about the superiority for imaging of Wheat Thins and their holes versus soda crackers. Sturdier too. But I never did anything about it.
Our house was built in 1928. It's fairly original and is in pretty good shape but it had several festering problems that needed addressing by a competent carpenter. When the project began, realizing we were about to seriously crack on, fate deemed it should be documented with a Wheat Thin cracker hole in The Crackon.
I wanted to use as original a cracker hole as possible. Wheat thins are darker than most crackers, but I thought some extra light proofing with a Sharpie was acceptable. Looking at it with the light on my phone behind it, my normal test of opacity, it's nowhere near opaque. It would only be exposed when the shutter was opened. I thought the differential exposure between the cracker and the hole would be sufficient and it wouldn't matter.