I have GMed hundreds of sessions of Fate Core and I think is the best of all the systems for just getting the mechanics out of the way and having fun and letting the players go wild with their imaginations.

You can play it with the classic fate dice, or modify it to just use coins, a D20, whatever. There's even an easier system called Fate Accelerated that boils it down that even a fairly little kid can grasp.

I like both systems because rather than try to be a "realistic" physics and combat simulator, it's a just a loose set of mechanics for making any type of game.

Last week I ran a session that was the main characters getting ready for a fancy ball where they needed to convince the regional governor to quarantine the station against a deadly plague.

They prepared by:

• designed costumes and dresses to blend in
• invented a new makeup style to help catch her attention (that went on to become a huge trend in the net)
• organized evidence of the plague into a punchy short form video
• collected more data from the local station researchers
• planned how they would get the regional governor alone at the ball to have a few minutes word with her to make the pitch
• hacked into the station network to control the lights and music and see where everyone was

All of that played out with dice rolls using their skills.

Fate has an easy mechanic for preparing advantages in advance, so they were able to do all this before even showing up for the ball, so they rolled in with a pile of advantages like consumables they could use to boost bad rolls when trying to build trust with the governor.

At the ball they had to race against their competitors who were trying to sow distrust with the governor, stopping them while at the same time building confidence with the governor. Impassioned speeches, perfectly timed dance moves, the best etiquette at dinner, and even intimidating the lead researcher so he didn't panic and cause the station to fall into a riot.

This isn't even anything weird or crazy, Fate is more flexible than any other system: your players make an impassioned speech, swing from the rafters, or take the epic sniper shot. They can alter the fate of the universe with a new makeup style or the right cut of dress (my players spent a good ten minutes deciding if they should wear a princess cut or Cinderella cut gown!)

Highly recommend it for a kid's game or adults! It's just better for playing games that are only limited by the imagination of the players.