Dress warm and wise:
Dress the child in a turtleneck with a sweater over it. It will be less bulky then a coat. Use body fitting sweat pants instead of jeans. Jeans tend to absorb sweat and get bulky and take time to dry. They are also not very stretchable.
A skating dress:
You can get a skating dress for your girl if she plans to take regular skating classes or practice. However if it is an occasional recreational activity, it might not be a very good investment,
Use seamless socks. Socks with seam run against the foot and cause discomfort and even blisters. Socks should also be not very thick as they can stop blood circulation in the foot area. Keep an extra pair of socks in your bag lest the skate boots do not fit or too worn out.
Keep the hair tied:
For girls, make sure that the hair are tied back tightly and do not interfere while skating. This can cause serious accidents and discomfort. For boys keep short hair if doing regular skating practice.