My 7 year old daughter was out killing her Kazuma Falcon 90 all day on the ice yesterday and for another hour today. I think for a 10 year old it'd be a little small and maybe a little underpowered but only if they were experienced riders. I have the throttle stop screwed in quite a bit but its studded up and she was shredding the ice and sliding it like us big boys.
Overall the quality of the Kazuma is OK. The fuel petcock started to leak on the normal setting but reserve is OK. I have to order a new one, its only like $15. Other than that my only complaint is the relatively small fuel tank. Its got dual A-arms up front, full rear suspension, electric start, and disc brakes all around that all work off a pedal by her right foot. Its a great play quad and for $750 you can't beat it. If the kids want to go MX racing then I'd go with something better.
John
1985 Eddie Sanders ATC330r
1986 Monstecate
1984 ATC70 (awaiting 125cc transplant)
1984 ATC125M
1986 GSXR 750 - Keepin' it old school!
1999 Arctic Cat 500 4x4 plow machine
1999 Arctic Cat Thundercat 1000 (lake lizard)
1996 Arctic Cat Jag 440 L/C (ditch banger)