The first bean that sprouted now looks like THIS:
And the first cucumber sprouted has a new kind of leaf ... one that looks MUCH more like the ones I associate with squash type veggie plants:
I'd say I've got some pretty happy plants! When they're about 5-6" high, I'll risk transplanting them & moving them into full sun. Where they can grow even more, get rainfall easier, and have access to bugs to pollinate them!