robots the video game is like a fps with a bunch of guns and a light saber, and yes there is no blood, its more clean than you can imagine. There is also a game called Cube 2: Saubraten. It has a feature were you can turn the blood on and off. Its Open Source, so it free too! I believe that you can also do the same in a game called Assault Cube, which is based off the Cube 2 engine.
no
phosphor and paintball paradise
There are several places one can obtain Free FPS. These websites include MMOBomb, Free MMO Gamer, Combat Arms, Battlefield Play4Free, and Online FPS.
Yes, try quake live.http://www.quakelive.com/
No, but there is a free version on the main site.
yes there is lots, in fact warrock and combat arms is all i know now , ill keep you tuned
FRAP's,
FPS or First Person Shooter Games can be found free on the internet. Sites like Mmobomb boast 10 free games for it users. There are many more sites that have free FPS games one just needs to find a site they like and register.
There is an old one call the suffering it's hard to find now but it runs abit like skyrim and its free and offline
Team fortress 2
phosphor, paintball paradise, and orange fps
Actually, to the previous answerer, none of those games are "First-Person-Shooters". Sadly, i do not think that there is a decent FPS for kids available right now, but I'll get right down to making one :)