Tricia from Leafy Treetop Spot shares a free pattern for making her Sweet Pea Dress for babies. It’s made like a pillowcase dress, but out of soft knit fabric (recycled from old t-shirts). The pattern is for a baby 6-12 months, but you could also adjust the pattern up or down a bit as needed. Get the pattern and tutorial.
[photo from Leafy Treetop Spot]