There is something exciting about growing plants/flowers from seeds. It's almost like seeing life bloom!
Magnolia....my grandmother used to do that with a sweet potato and it made the prettiest vine behind her kitchen sink by the window. I had forgotten about doing that.
Gsees....the only thing I've ever grown from birdseed is grass sprouts. I used to put birdfeeders outside around my flower beds but then wild grass would sprout up and I'd have to weed the flower beds more often. I know there are some birdseeds that doesn't do that but I always move my feeders back from the beds now.
One of the things I love is seeing an odd flower pop up like a sunflower, where a bird has dropped one of the seeds in their flight. Sometimes nature gives us beautiful surprises.