We can discuss medieval medicinal theory, and we always introduce the use of incense resins (ie Frankincense) as “suffumigations”. We can also demonstrate the production of the essential oils by early distillation methods.
The public are able to smell, handle, and buy the (non-toxic) resins.
The Shop is intended to portray a working apothecary from the 14th to 16th century. However, the public will often assume the characters to be doctors, alchemists or even “wizards”!