Here are four good websites where second graders can read about the history, environmental impact and process of making CHOCOLATE:
https://www.timeforkids.com/g56/sweet-solutions/
http://www.kidcyber.com.au/chocolate
https://www.cbc.ca/kidscbc2/the-feed/5-ways-hot-chocolate-is-enjoyed-around-the-world
https://www.dkfindout.com/us/explore/story-chocolate/
And an interactive quiz about chocolate. How much do you know???