How many five year-olds could you take on at once?

As a parent of a four-year-old and a six-year-old, I’m forced to think about this sort of thing occasionally.

From the linked discussion (which contains complete rules for the battle):

Are you allowed to use one the kids to wield at other kids ala a sword?

It is not hard at all to swing them around and if so then i have a feeling you could just swing around in a little circle and knock them all out as they get close to you.