While I could play quiz games or give a simple quiz to my class without iPads, we have come across a website that my class begs me to use. I was introduced to Kahoot in a meeting, and I tried it with my class. Once was all it took for them to request it daily. I don't think they realize I still have to design these quizzes online! :)
It would be a great tool for so many venues, and it allows quick poll-taking that can then be pulled up in a spreadsheet by the quiz's owner. My class doesn't realize that part, so if they treat it too much as a game, I can see who is consistently missing questions. The other cool piece of Kahoot is that it can be used on any web browser, so iPads aren't necessary.