How about getting a feature fabric and makea nine patch with it as the center block. the outside blocks can be some of the colors that is in the feature block. I would suggest 12inch blocks, with perhaps the feature fabric as the border too. or even a favourite color that is in the feature fabric. I am doing one similar for a baby with ballet dancer fabric. Let your daughter choose the fabric and show her how to use accent colors to set it off. I hope this helps you a little bit.