I just had my family medicals on 10th Oct. We had 2 kids of age 3 years and 1 year. All we did was to take our kids with us and they did only weight, height check, some measurements of the size of head and finally some checks with stethoscope on chest and back.
We did not take any pictures with us or any kind of forms, I did fill in few forms for my entire family in the test center though, and they took pictures in the center.