Sure I can make a Vato Rat T w/a Sharpie and a clean undershirt, but my kids are on to me and consider that to be lame.
How 'bout a run of a couple of your standards - Powell Dragon & maybe a Vato Rat in Youth Small sizes? Even a bunch in the 6 year old kid range - not sure what that would be, but its the size range below Youth Small.
Hell, I'd pre-order. I bet there are enough us on here who would like to get our kids skate shirts. If I have to pay to put a logo on my kids' backs, might as well be from a company that I like.
Also - no white shirts - little kids ruin them in a heartbeat. Dark, stain hiding, reds and blues, please!