USPS Operation Santa is similar to Angel Tree; you adopt a letter and shop for the items listed in the letter. I don't live near an Angel Tree location, so USPS Operation Santa is more convenient for me. You can choose to shop through the website USPS provides, and USPS will ship the gifts, or you can ship them yourself if you want to buy from other websites, which is what I chose to do. I was able to adopt one letter for a 2-year-old little girl and decided to share everything I've got for her in case you're shopping for a similar little girl! In her letter, her mom stated that she wanted some kid's makeup (little miss loves playing with her mom's), Play-Doh, hair accessories, and clothes/shoes.