Edventure Maze is an interesting little exercise.  You, and students, can create mazes (either a cornfield one or, I believe, one based in the Australian Outback).  In order to navigate safely out of the maze you have to answer a series of multiple choice questions correctly.  You, or your students, create the questions and answers.

The mazes you create stay on the website for a month, though I believe (but am not sure) that you can “renew” them every month so they stay active.

This might a fun thing for English Language Learners to do sometime.  It requires content knowledge and the correct formulation of questions, in a fun way.

I’ve placed the link on my Examples of Student Work page under Student Educational Mazes.