You can take a lot of cuttings from shrubs like forsythia and just stick them in a jar inside, and they'll probably blossom. But with other varieties it may take a longer time, so I think it's a good idea to hold them someplace else like the basement while the buds start to develop and only put them out for display when they're about ready to bloom. In a heated house, with dry air, the buds might dry up and die.
Well, Carrie, you have to accept the fact that some leaves sprout too. I have done this with both stellata and saucer magnolias but I am more partial to the blousy pink blossom that results from the saucer magnolias. And I fill a pretty large, tall glass vase that doubles as the umbrella holder, though it would work on a smaller scale.