Have cradle, will rock.

I've had infants on the mind, what with the arrival of the vandebaby, so more Zeus.

There's the familiar legend of Amalthea, the she-goat who nursed Zeus (holding off on all Last Unicorn references), but there were two lesser-known attendants--completing the naiad triad of maiden/mother/crone. I forget their names, of course. The mythology places them all in a cave, but a tree also figures prominently, and because branches are easier than caves, here you have it. Plus, I like the idea of the little Thunderer dangling over all--a "zeus" ex machina, if you will--it works better, artistically.

Anyway, I think it's been proven that a god hanging from a tree is the lasting image.