Microsoft Office Mix is an add-on for PowerPoint. With Mix you can add polls and quizzes to your slideshow. I absolutely love this feature. Downside is your slideshow won't work offline but has to be uploaded to Microsoft server.
I prepared a show with three slides. Please try it and you'll get to know how Office Mix works. If you want to try Office Mix yourself you need Office 2013 or Office365 installed on your PC. In addition Microsoft account is needed. You can download Office Mix add-on for PowerPoint here: https://mix.office.com/en-us/Home
Hint: Click lower right corner of the slideshow to enter full screen mode.