He was keeping the expired bread into a container and covered it for a few days.
Here is the result from the experiment...
The mold grown all over the bread.
Rhys is happy to see the mold and he is trying to Google for more informations about the mold.
A mold or mould is a fungus that grows in the form of multicellular filaments called hyphae. In contrast, fungi that can adopt a single-celled growth habit are called yeasts. Molds are a large and taxonomically diverse number of fungal species in which the growth of hyphae results in discoloration and a fuzzy appearance, especially on food.