I rang around few places... No age limits that i have found... 1 place said their gun was a bit big for little lobes but said they could use a special piercing needle... I'm not going for that option.
Hi Jess

i had my eyebrow pierced with a needle and have had a number of holes in my ears with the gun. The needle was much less painful and less of a shock than the gun. I would go the needle if i ever get another piercing.

Not sure how they would go doing two at the same time though!

k