Hi, mamaS,
I cooked my bird's nest with an electric crock pot. The ready ones are just the same but they're much more expensive.
I'd been eating bird's nest before my pregnancy, but its effect was most obvious when I was pregnant. Bird's nest is mainly protein and collagen. My father thinks I'm exaggerating it's beneficial effect, something like a placebo, but I can feel the difference when I was eating it while pregnant. I was less tired, slept better and less stressful. But make sure you buy the real ones. The cheaper ones are often better than the really expensive ones, which are made up of glue. Don't buy the shiny ones, which mean glue.
However, I won't advise giving a baby bird's nest, since he/she may be allergic to it, and too young to digest it.