I know! It's so exciting!
We now have a total of six redbud plants growing in the front office.
Since the last update, several more seeds sprouted, grew a little, and then failed to thrive, but these dudes seem pretty stable. I have several growing in little pots at home, too--those probably sprouted later because they are outside and subject to the whims of our winterless weather.
Anyway, another couple inches and then it's time to put them in bigger pots. I'll probably keep them on my back porch at home until they're ready to plant next winter. There's a nice blend of shade and sun back there, and I won't forget to water them if they're in a spot I walk past several times a day.
The end about redbuds. For now.