The packaged sprouts from the grocery store are generally not recommended for birds since they frequently contain bacteria. Making your own is better, using your bird's regular seed and/or human-grade grains from your local natural-foods grocery. It's easy, too.
There's some general advice on sprouts for birds at
http://www.landofvos.com/articles/sprouts.html In general, the sprouts are most nutritious when the root has just started to emerge from the seed - you don't have to sprout it out into a long tail. Even just soaking the seed overnight will start the germination process and improve the nutritional content.
I make sprouts using a mason jar with a piece of plastic canvas mesh (available at craft stores like Michaels) in the lid:
I rinse the seed, soak it overnight, drain, rinse, and drain again, then let the damp seed sit, rinsing once again in the middle of the day and once again at bedtime. In the morning the sprouts are ready to serve. If you're not home in the middle of the day it's OK to skip that rinse. Total prep time: about 36 hours. Total time spent actually working on it: about 3 minutes. The tiels love it and frequently choose sprouts over dry seed.
It's recommended to tilt the bottle at a downward angle during the damp-sitting phase so excess water can drain, but I live in the desert and it works better for me if I don't do this.