A week and a half before we left on our trip(we were in disney over Thanksgiving) My son age 7 broke his arm in school during recess. His cast went from right under his shoulder to his wrist and he also had to use a sling with the cast. Of course he couldn't go swimming while we were there. For the most part, my son did not ride any of the jerky rides(space mountain, thunder mountain railroad, star tours, tower of terror, or the rock and roll roller coaster etc) We had told the doctor we were going and he was fine with us going but since my sons arm was newly broken we were probably extra careful as to what he could ride because the doctor told us with my sons type of double break a re-fracture if it does reoccur will happen the first three weeks after the cast is put on. I would ask your doctor what he thinks since your daughter will have already had her cast on for a few weeks by the time you go. My son got his cast off yesterday after wearing it for six weeks. Your daughter will still have a great time even if she is still in her cast. Don't forget a sharpie marker for the characters to sign her cast--my son got some extra attention for having a broken arm.