Answer: The best way I know of to find a variety of images of a given plant is to use a good search enging such as google and search using the Latin name for the plant. This usually brings up results fairly quickly, especially with perennials. With herbs, you may also need to add the term culture to avoid bringing up other types of results.
In the meantime, I would strongly suggest you work with those children and their respobsible adult(s) to teach them that they are NEVER to eat any plant without an adult being with them and saying it is ok. There are just too many look-alike plants and too many commonly grown plants that are toxic to allow them to think they may nibble on whatever strikes their fancy. This is also true of houseplants.
I am sorry about the tag mixup but things will sort themselves out soon as they come into bloom.
Q&A Library Searching Tips