That works well for us too - so should we say the 6pm on the Sat after the Survival PvP hunt event?
So far I've walled off a large section for the hunt to take place in, in the middle of nowhere (including what was an unexplored chunk, so I assume nobody has ventured into this area at all), which will have a warp to it.
(this bit is secret - so don't tell them) ....
..because it's for kids, I thought I'd try to make it a bit more interesting than just hunting in plain terrain... so I've made a tower in the centre we can keep watch from (you can see the whole area from it)... a basic cart track down into a small cavern system to explore (and one back up, so there are no collisions heh)...... a sort of "ruins" place for them to climb around on.... a (very basic) sunken/broken ship, and I'm working on a little village area, with houses to explore... and there is also another small natural cave section they can access easily while just exploring in a forest area...
I've covered over and blocked up a great many cave systems and natural holes, so that nobody can get lost or fall (sadly, some of them were cool!)... so it should be nice and safe for all. Falling off the top part of the ruins isn't tall enough to cause death, but it does take off the majority of your life (but it regenerates, so its ok)... and I'll make sure there is plenty of treasure for them to find, because we don't want any upset kids!
What treasures do the kids want?
I imagine things like bones for the wolves (since you can't get them without spawning them on creative)... perhaps coloured wools or dyes? Novelty things like golden apples, cake and cookies? ...glowstone?..
Ask the kids what they would like, and let me know.