not a bad suggestion to be honest, not entirely sure a sparkler would be a reliable ignition source though.
if you haven’t tried it yet (be fucking careful) you should make some fireballs to mess around with, take a rag, some zippo fluid (or equivalent, ronsonol, i guess?) and douse the rag until it drips with wetness, form it into a ball and rubber band so it holds the shape.
light and you’re good to ignite, they’re surprisingly harmless to let sit on the flat of your palm and other stuff, someday i really need to finish learning how to juggle and that’s when this gets impressive.
big thing to remember, is the base of the flame is barely even warm, the top is the pain end, still don’t just let it sit there burning away too long though.
either way, when you need to extinguish just close your hand around it completely to starve it of oxygen, also resist the temptation to throw it at your friends, it’s hilarious, but it’s a also pretty dickish thing to do and not exactly safe either, if they’re wearing a shirt with fuzzies on the front it can engulf them in flames quite hilariously for a moment to be honest…