I think I'm going to whip up a batch of these. With the two-color screenprinting, they'll probably be $20, plus a couple of dollars shipping.
You can order either a onesie or a toddler t-shirt via Kickstarter. The Kickstarter project will end on Sept. 18, and then I'll print the entire batch of shirts and onesies at once. Expect delivery around October 16.
I have no idea how many to make. Unfortunately, the number I have in my head today is much smaller than the number I imagined a couple of weeks ago when I the idea came to me. I'd like to be wrong, though.