Best iPhone Apps for Studying Japanese 2: Quiz4Kids (Japanese Version)

This quiz app has easy questions, like "What color do you get if you mix yellow and blue?"  - the challenge is reading the Japanese to understand the question and the 4 answer options. Quick, fun reading practice.
Downsides - no lookup function, question bank not huge so questions repeat fairly soon. But FREE so can't complain!
Click to see this app in iTunes