I made this dress for my 4 yr old daughter from a xtra small womens tshirt on the sale rack at target. It only cost $3.99! She loves it because it has big sparkly flowers on it and it's soft like a tshirt.
..and the back. I had to put a little makeshift dart thing so it wouldn't gape.
I picked up a camo shirt at the Army/Navy supply store. That one will be the next dress.