If you travel through Union Station in Washington, D.C., maybe you’ve already seen the advertisements — a poster of a cute 8-year-old girl wondering why her school lunch isn't as healthy as the president's daughters' lunches.

The ad campaign, sponsored by the Physicians Committee for Responsible Medicine, is targeted at members of Congress and their staff as they make their way daily through Union Station. The ads are timed to coincide with Congress taking up the Child Nutrition Act for updates.

The Physicians Committee for Responsible Medicine is not the only group targeting Congress and asking them to revise the Child Nutrition Act to make the food children get in school actually nutritious. Currently, public school children are commonly served a rotation of high-fat, high-carbohydrate foods like chicken nuggets, French fries, burgers and pizza with few healthier options.

There are many groups working to get the attention of Congress on this issue. Here are just a few:

Slow Food USA has a petition you can sign that will be used in a public display of support during this year’s reauthorization of the Child Nutrition Act. The group is also asking people to organize eat-ins in public places on Sept. 7 to send a message to Congress.

The Healthy Schools Campaign urges individuals to contact their state representatives to voice their personal concerns about the issue. By inputting your ZIP code, the site leads you to a letter that you can send as is or you can customize a letter that will be sent to your state representatives. It also gives you the mailing address of your representatives if you want to send a letter yourself.

The makers of the movie Food, Inc. have a petition that you can sign on their website that will be delivered to Congress before the vote.

MNN homepage photo: Chip Somodevilla/Getty Images

Robin Shreeves ( @rshreeves ) focuses on food from a family perspective from her home base in New Jersey.

Why don't all students eat like the president's daughters?
A new ad campaign tries to get Congress to reform school lunches by comparing the first daughters' school lunches with the rest of the country.