You did such a good job on the dress and your daughter is simply gorgeous. I made all of my daughters clothes when she was little and I used cotton thread. I never had any problems with it. The one thing I will say, is to use new thread. I was given dozens of spools of thread that my grandmother had stored and the thread broke so badly I couldn't use it and it was so frustrating. Joann's is having a pattern sale next week, you may want to pick up some easy patterns for your DD. It is such fun to sew for little girls.