Have great fun with that, Calan. My kid started that way, and my nephew still loves to try shooting the drones.
But it isnt jsut for the kids... leaving the ammo count high and the rest of the settings unchanged is great for your own gunnery and deflection practice. I still ahve my offline ammo at soemthing like 100x., so I dont ahve to climb out each time I go bingo.
But watch out...a couple years later, my kid turned into a teen, and he got his own AH account. His first month he had a higher hit%, higher kill per hour, and better TnB skill level than his dear old dad. After a ocuple months, he's moved on to Battelfield 2 -- but the addcition will be back, I have no doubt.