Colin's camera?

[jdr0918]

No: HPFGUIDX 90272

<<<In HPforGrownups at yahoogroups.com, "Dysis" wrote: ...Any cameras 
that I know of work on batteries. Hmmm. Maybe I'm not exposed enough 
to this world...>>>

The Sergeant Majorette says

Or maybe you're just young. A camera is just light on silver salts. A 
common kiddie science project back in the day was a simple box 
camera, which was a black box with a pinhole, somewhat akin to the 
homemade devices you use to observe an eclipse.

Of course, as you can tell from my description, I was no kid 
physicist. I had to use a storebought Brownie camera...

--JDR