Karen's Roller Skates (Baby-Sitters Little Sister #2) - Ann M. Martin

It''s fun to be a Baby-sitters Little Sister! Karen will try anything!Karen has new roller skates. She is a very good skater. She can ever do tricks.But oh, no! Karen falls down and breaks her wrist! She has to go to the hospital and get a cast.Karen wants somebody famous to sign her cast. It isn''t going to be easy-but Karen won''t give up till she gets the job done!