I've seen multiple versions of these, and I think they are both fun and lovely.
This one is from
Sunset Magazine - Art in a Pot:
Fashioned after
Monet's Water Lilies.
According to Wikipedia,
The leaves of all stonecrops are edible.[7]
Other succulents, houseleeks (aka hens-and-chicks, or
Sempervivum) I'm not sure if are also edible, though the gelatinous fluids inside I have used as an aloe vera substitute for scrapes, cuts and burns.