Sabrina has a homemade Dora costume. I even made her bracelet.
To make Map, I took cloth we already had and wrapped a paper towel tube in it. Then I taped it and drew on the face and blue at the top with marker. Sabrina wanted me to add a cape so I used felt that we already had.
For Backpack, I took her Princess backpack and spent less than a dollar on purple felt that I sewed on to cover the princesses. Then I glued on sheets of foam that we already had for the face.
Her dress is one that I got for when she's older so she had to wear a shirt under it.