You know what's always fun to do with children?
Teach them ways to play with fire that could potentially burn down an entire town and ruin lives (I'm just guessing...I don't have kids and am not allowed near them without supervision).
In the following video you will see that all it takes to create a tornado made of fire is 5-6 bottles of lighter fluid and 11 box fans circled around a fire pit.
Seriously, that's the minimum amount of work it takes to make A GIGANTIC, SWIRLING, SHIT STORM OF FIRE!
I really think the kids would like it.
Source: Obvious Winner