Summary: I liked it! But the grandkids, not so much. Age-wise, I would say that there is only a small window of time where it might captivate the intended audience. The Wii just doesn't lend itself out well to educational games. I've had much better luck finding such games for Android. Considering the prices these days, buy your kid a tablet, and forget about making your Wii into an educational tool.
Summary: The negative review is unfair & likely written from someone outside the target audience. The Reader Rabbit game is a very decent Wii game with good graphics and best for Pre-k kids 4-7 years of age. Younger kids will love characters, colors & music but may be unable to grasp learning content or controls. Re-playability may be limited once all tasks are finished.