Just wanted to add I use Disney Dollars as part of my daughters allowance. And also give her them for special occasions ie; holidays now that she is older. I also ask family, if they are looking to buy something for her, to give whatever denomination in Disney Dollars. I feel it's a great gift and it's one less thing I have to budget for on our trips to WDW.
Disney Dollars are good at any venue, owned by Disney on or off property.