I purchased Chicken Hill's children's PDF hat pattern and tutorial, to be made using recycled t-shirts.
Work in progress, I used three different damaged t-shirts ...
Using jersey fabric means the hat is perfect for slightly cooler autumnal weather, but for the middle of winter, the addition of a fleece lining might be suggested. I eliminated ear covers for my version :)
Jnr RF loves his recycled hat
Chicken Hill also offers the amazing scrap fabric wings/cape PDF sewing pattern and tutorial...
And more little girls dress patterns here
Have you used old t-shirts to make into something else other than another tee? Feel free to provide a link to a blog post below if so.