Everyone gets screened – even the screaming infant, but rest assured that the policy is to never separate parents and children. When you travel with kids it takes patience and a bit of creativity to get to the boarding area. You can carry breast milk, formula and certain juices in ‘reasonable’ quantities over 3 ounces, they just need to be declared.
If your children are old enough, get them engaged in the process and interested in machinery and the uniforms. The walk-through can even become a game. For more creative ideas see: Traveling with Kids TSA ideas & videos http://ow.ly/2l1Xh