They surely would need candies and chocolates but make sure you impart to them that quite a bit of such would be unhealthy.
That way the growing process can lead to healthy, tasty and profitable mushrooms. Neutrals are best for creating a light and soft environment and giving the illusion of space. https://telearchaeology.org/TAWiki/index.php/How_To_Plant_Mushrooms_-_Improve_Your_Own_Oyster_Mushrooms_Indoors