This weekend I really needed some help putting folded laundry away, so I asked my daughter to put away her brother's clothes as well as her own. I told her since this is her brothers stuff she could add another book to her book order through school. This way she was being rewarded for her extra work. Well, this morning I went upstairs to my son's room to get some clothes for him, and she had put his clothes in all the wrong drawers, she made a mess. Before sending her off for this task I told her how to do it, there wasn't very many clothes to put away and she always does great job on her own clothes. Now I don't know what to do, I had to spend 10 minutes rearranging the clothes. Should I still let her get the book for her extra work or not? I plan on speaking to her about doing a job well, she is almost 10 so she isn't little. I'm not sure if I should take away the incentive I was going to give her for helping me out by doing extra work, or if I should give her the book and just explain to her that she needs to do a good job when she is given a job to do. Advice, please?