The music that's played while in building mode gets rather annoying, but the rest of the sound is good. This actually makes it a pretty good game for someone who's hearing impaired, especially since all of the commands and tutorials are visual. Any child who can read should have no problems. The biggest difference is that you control the people instead of just their environment. I must admit that this is the most addictive game I've played in quite a while and my grandkids agree.
Babies come from kissing and there is no nudity.
I do recommend checking out some of the fansites for additional skins, but be careful since some are very tacky or R-rated. Others have created beautiful gowns and even Pokeman T-shirts for the simkids to wear. However, some of the relationship situations are more for adults. Interactions between sims are based on their personality points. Nice sims are more likely to give gifts, while mean sims have the option to slap or insult.