@gbrl_dick The secret is disposable plastic everything, even tablecloths, and responding to euro objections by pointing out "but they're red white and blue!"
@gbrl_dick Also give a pocketful of cherry bombs to each kid upon arrival and stack your stockpile of obnoxiously large fireworks in a prominent location to entice your guests to stick around and watch you light "the big one"
@gbrl_dick For bonus points arm the kids with a plastic bag of plastic water balloons and set up several sprinklers "for the kids to play" (then blithely ignore that no one is playing in them and you're creating a swamp)