Ooh, flashcubes! I never had a camera that used them, but I remember them. I wonder when they went out of production? I see you can still buy them e.g. from third party vendors on amazon.com, presumably from old stock from camera stores.
As a child I bought a used Brownie Hawkeye flash model.
That was the camera that got me interested in photography. The flash bulbs were one-use-only (in the image you can see a blue one in the flash reflector). Although the camera was a little old, they did sell replacement bulbs and compatible film at the neighborhood drug store.
Of course the camera optics were nothing to brag about, but the medium format 6 cm x 6 cm negatives was terrific. In the right conditions (i.e., good lighting, or in conditions suitable for the flash), I could get incredibly detailed prints. 'Particularly for a camera that I picked up for about $1 at a garage sale.
Replacing those bulbs was a real pain though. (A pack of bulbs cost more than what I paid for the whole camera.)