I created this quiz a few months ago. It has 16 edible plant pictures that are shown a total of 4 times each (different pictures each time). I made this myself as a tool to learn, but I guess it might be useful for others too.
I couldn't find a way to put the file on a web page without signing up to make an actual website, so here is the download link to the html file. When you download it, double click it and it will automatically open in your internet browser.
Open this link then click "Click here to start download from sendspace" then click save file.