According to ESRB, this game contains: Mild Violence
Parents don't have anything at all to fear. The only violence I could find in the game consisted of spearing fish in a river or shooting arrows at wild game, and even these activities are completely bloodless. There is no questionable language, and there are no sexual situations. (The main characters sleep in separate beds, just like a 1950s sitcom.) There's absolutely nothing that could be construed as risqué for unsafe. It may be extremely slow and boring to most kids, but they certainly won't be corrupted.
Players looking for unique gameplay experiences would do well to look into this title, but be prepared for a lot of tedium and repetition. It's somewhat similar to Harvest Moon or perhaps Animal Crossing in some ways, but the focus on the survival really gives it a different sort of flavor. My advice would be to play this game for an hour a day. Any more than that and gamers might find themselves going a little bit loony.
Deaf and Hard of Hearing gamers will have no problems at all. All dialogue is presented through text, and there are no significant auditory cues. All relevant information is available through menu screens, and having played approximately 75% of the game without any sound whatsoever, I can say that there were no difficulties. Buy it with confidence.