Your Pal Fred by Michael Rex (ages 7-10)

He's a super-nice kid in an ultra-mean world.
He believes even the worst people are good inside.
He'll always be there for you... even if you boot him out of your castle, pit him against a mechanical giant, put him on top of a pole in a lightning storm, and trap him in a booming dance party that lasts all night long.

He's Your Pal Fred.
 
In a brutal world far in the future where only the savage survive, a life-size toy suddenly activates. Fred was built to be a best buddy, and his relentless kindness  never fades, even when everyone else is rude. Determined to make the world a better place, he has the bright idea to talk the two most powerful and battle-hungry warlords, Lord Bonkers and Papa Mayhem, into being friends. It's a mission doomed to fail, unless Fred can find a way to inspire everyone to play nice!