Here is a quiz I made very quickly for the students to relax a little. Separate the class in two groups and each group must answer one question after the other. It works really well especially when your students are a little competitive. It takes me around 50 minutes to do the whole quiz properly. Doesn't work very well in a big class though. The quiz misses a lot of stuff, but you can rearrange it the way you want, erase some questions and add others for example.