Universalis with kids?

So this actual play post got me thinking about using Universalis with kids. I have five kids, though only three are old enough to want to play (9 yo boy, 8 yo girl, and 5 yo boy). We haven't played any RPGs yet, though they know I play and have shown some interest.

I've known about Universalis and been interested for awhile, but I just bought it and haven't run it yet. I'm planning on running it with my regular adult group when our current campaign ends in a couple months, but I had already been musing about whether it would work with young kids.

Has anyone here played Universalis with young kids or even just thought about doing it? In the post I linked, the author (jdfristrom) listed some Gimmicks that he used (paraphrased below). Any thoughts on these gimmicks or variations? Any other Gimmicks, techniques, or suggestions?

Events and facts are free, but you use d6's for complications so you earn less (1-3 per win). Loser gets 1 coin per 2 dice, round up.
You can spend 1 coin to give a component to another player
Don't take the kids' characters away from them

(And feel free to throw out any thoughts on RPGs with kids whether related to Universalis or not).

Thanks,
John B.