Here is my entry, I bought these 2 tops from a charity shop.
They are both 100% cotton and I thought they would make a pretty vintage style dress and apron for my toddler niece. Here's what I came up with..
I kept some features from both garments. The dress has the button placket, the slight hi-lo hem and slits in the side seams from the original shirt. The apron has retained all of the lace detail and pin tucks from the front of the original blouse and made a feature of the wider lace. I did add some new (from stash) plain cotton to face the bodice with. There was plenty of fabric for the flounce and bias binding.
I drafted my own bodice based on my toddler, but he's a bit older - I did make it a bit smaller than his measurements but I feel it will still be a bit big for my niece. However, I am really pleased with the result! Goes to show that you don't always need to start with new fabric to dress the small ones.
There are clickable larger pics
here should you wish to see a rambling blog post about them.