This is absolutely the WORST possible scenario to introduce kids to role-playing with.
The publisher's page states that RPGs teach creativity, problem-solving and cooperation. As a simple statement, I completely agree. That is, IF children are introduced to RPGs with a good adventure.
This one does NOT teach any of those. It teaches children to act without thinking, to kill caged animals without question or thought, to kill caged sentient beings without inquiring why they're caged to begin with. It teaches children that empathy is bad.
If you want your children to be mindless slaughterers, this is the way to go. If you want to foster good roleplaying habits, avoid this like the plague.
[Note: I have no problem with the mechanics of the game.]