After the game has been rented out and reviewed by gamefly customers, you should be able to read about it & get a feel for how fun it is for kids to play. Considering it has only been out for a couple days and isn't in high demand, it may take some time before a detailed comment is written about it.

The risk is minimal if you just go ahead and rent it- if you (or your kids) don't like it, just pack it up and return it for the next game available in your Q. That's the only suggestion I have, so I hope it helps!