It purports to have a quiz for instance that will deduce who you are as an Australian animal. I don't think anyone is going to take it too seriously, but after answering a few quick questions, I found out I was a sugar glider.
You Are a Sugar Glider
You are both cute and active. You are very curious about the world around you.
People may find that you are a bit quirky and offbeat, but you are truly very intelligent.
You are very social, and you bring a playful element to every occasion.
You are easygoing and not at all aggressive. You only will act to defend yourself.
There are hundreds of topics though spelling isn't their strong suit. Students could innovate on the idea and make up their own quizzes, perhaps for a topic they're studying: What Kind of Fish Are You?
I also found a How's Your Vocabulary? quiz. This would be a fun thing to do before starting a program to enrich your own vocabulary - like subscribing to Anu Garg's Word a Day, or others in this Make Use Of article. Don't forget that a great way to enrich your child's vocabulary is to read aloud from great children's literature, not forgetting the classics!