1. Separate the problem hair into small sections about a half inch wide or so.
2. Spray with a little conditioner or water. Not runny wet just a little damp.
3. Brush it out a little so that it will work better. But not so much that your child starts to cry.
4. Heat up an electric hair straightener and apply it over the problem area. You may need to hold it there a little longer than normal. Then rebrush the hair and repeat steps one and three until hair is soft and manageable.
Let me know if you try this and how it turns out for you.
Note: If you try this on a toy set your hair straightener to the lowest setting.