If you live in Mermaid's Hands, sometimes you walk to the mainland across the mudflats, sometimes you take a dinghy, and sometimes you wade. On September 3, Em and her sister waded:
The water was not quite knee high as we waded over. We had our shoes tied together by their laces and slung around our necks so we didn’t have to try to fit them in our backpacks.
In some communities in the Philippines, kids weren't so lucky as to have dinghies for the days when the tide was high--they would swim-walk a half-mile of open water to get to school, with their books wrapped in plastic and balanced on their head:

Source: Peter Shadbolt, "Yellow boats bring hope and education in the Philippines where the school run can be a swim," CNN, May 20, 2014.When a Filipino blogger found out about the situation, he established a foundation that provides schoolboats. Now the kids can go by boat to school:

Here, meanwhile, are Em and Tammy, setting out for school. The houses of the kids in the Philippines were on stilts; Em and Tammy's house sits on a raft.

I realize Tammy in this picture looks rather like Em in the icon, whereas Em looks different from how I've drawn her in the past--because her hair is different in this picture ... and because I have very limited ability to make a person recognizably the same from picture to picture if I change cues like hair. (Also, Em in the icon is by Kelsey Soderstrom, a professional artist, whereas I'm a rank amateur.)