We all like to interact with the internet. If you're interested in ethics, you may try contriuting to a debate (for example, the BBC's ethics forum). There are not many online quizzes, but Harry Gensler has developed some alongside his Ethics book. They are at times infuriating, but they make you think. Keep score yourself if you want to - you won't be told how well you've done.
We are starting to develop our own quizzes on this site made by contentgenerator. There are now a number of interactive pages: