If you are interested in learning how to use the Cognitive Services APIs, I have created a set of exercises designed to take you through the basics of calling these services.
Lab 1 focuses on the Emotion API.
These exercises are open source and available here.
I have already used these materials at two university workshops this year.
You are free to use them – either for your own education or if you are hosting a workshop. I would appreciate any feedback you have. If you are very ambitious, you may do a pull request.