For children from the age of one to five years old, normal respiration is 20 to 30 breaths per minute, while children who are from six to twelve years old should have a normal respiratory rate that ranges from 12 to 20 breaths per minute.
Photographers especially maintain a modeling comp card file for future projects and to show prospective clients. A modeling comp cards is the most valuable marketing tool for promotion and exposure, so again we suggest you hire a professional photographer for your photo shoot.
There are a number of commercial packages you can use for such purposes. Comsol multiphysics simulation software is a general purpose physics modelling software package that I belive can deal with electromagnitism. The link to their website is http://www.uk.comsol.com. Ansys is another commercial vendor that provides a electromagnetic physics module. There website is http://www.ansys.com.