Our DD had about $200 in Disney dollars for our land/sea trip. (This was all her money - from gifts, allowances, chores etc.) She was responsible for purchasing all the "gotta have it" souveniers, and hair braiding. She made a charm necklace on the ship. She bought DH and I some "thank you gifts" and she got into pin trading a little bit. She also got some scrapbooking albums, an autograph book, and she purchased a couple pictures above and beyond what DH and I bought. And - she bought an Eeyore (at wdw).
She spent her money wisely, and my thing with her money is since she has earned it - she can spend it on just about anything she wants - except junk food.
She budgeted it wisely - because once she ran out - she was going to be out.