Here's an idea for a neat container. Pull apart an electrolytic capacitor of suitable dimensions!
Prise open the end of the case with a small screwdriver and pull out the rubber stopper and capacitor roll (best wear some latex gloves whilst handling this).
Use the rubber stopper for the LDR, and drill two small holes in the end of the can. Heatshrink the legs of the LED and push them through the can holes. Then push the rubber stopper end back in and fold over the end of the casing.
Should look quite neat.
BTW, where did you find the DIY LA4-A project? I did a quick search, but came up with nothing.