I store my life fruit and death flowers in my museum on the floor. I give all of my death fish to my founder sim. No one has access to my museum, or at least they shouldn't.
When an immortal qualifies for ambrosia, I give him/her a death flower and have my founder cook, who supermaxed cooking, prepare the ambrosia.
Oh and thanks for the tips regarding the sculpting of my founder as a YA, Agnes has now become a chiselmaster, and is fast closing in on the Permanent Ice challenge.
And yes, I love challenging myself in this. If I'm faced with utter ruin and get through it, I consider the victory to be that much sweeter!
Edit: Yes! Agnes reached her 25 ice statues with 5 days to spare before this founder hit Adult. As a reward I let her sleep before going off and freeing a kid at the school from the clay he fell into and then sculpting my founder.
Dek