I rediscovered my first ever camera recently. For your edification, here is a picture of it next to my newest point & shoot.
http://www.spectral3d.co.uk/yakyak/cameras.jpg
Note the advanced focal length setting (two options available) and the remenants of the tape based photographic paper mounting system. The shutter is not currently fitted, but sellotape and black paper are still readily available.
My dad made it for me when I was about 7.
Any idea if you can still get b/w photographic paper? One of my mates thinks I should mount a large CCD or CMOS sensor to the back board and fill it with electronics...