The bone will just find a new center, grow and fill in the gap, and then eat away the nub that sticks out! Crazy, eh? This process will take about a year. (She'll only have the cast for 6 weeks though).
The other options were to knock her out and set the bone again -- which they said may just return to the broken position again, or perform surgery and put a plate and pins in. This option is not a good idea for kids as it may mess up the growth of the arm.
She'll go back in 4 weeks and they may be able to put a short cast on :)
She choose a light-blue cast so one could clearly see the writing when people sign her cast. Should I get her one of these:
