I am on the lookout for natural products (e.g. herbs, spices) that could make interesting chemistry experiments.
There are various places on the web that sell a variety of herbal things and I figure some should have interesting chemistry.
Spearmint has (R)-(-)-carvone, while caraway seed has (S)-(+)-carvone, these mirror images smell different to most people.
Red cabbage is a pH indicator.
Turmeric/curcumin is also.
Tea contains caffeine. (I am working on extract it now...)
Any other suggestions?