the line where everyone sits
In every gurudwara on earth, at almost any hour, the same scene: rows of people sitting cross-legged on the floor, and other people walking the rows with rotis and dal, serving. The kitchen is called the langar, the row is called the pangat, and the whole arrangement has been running continuously for some five hundred years on volunteered hands. Nobody in that kitchen is on salary. The flour arrives as somebody's sevā, is kneaded as somebody's sevā, and reaches your steel plate the same way.
The rule that gives the langar its power is about the floor. Everyone sits on it. There is no head table, no special plate, no section for important people. The tradition keeps a story about exactly this: when the emperor Akbar came to see the third Guru, he was not refused — he was simply shown the row. First the pangat, then the meeting. The most powerful man in Hindustan sat on the floor in the line, ate what everyone ate, and only then was received.
Children who have eaten in a langar tend to remember it all their lives, and if you ask them why, they rarely mention the food. They remember the levelness — the one room where the question "who are you?" was never asked, because the answer could not change anything. Where you sat is where everyone sat. What you got is what everyone got.
That is sevā's quietest teaching, and the floor delivers it better than any lecture: service is not the strong stooping to the weak. It is everyone, at the same height, taking turns with the ladle.
If there is a gurudwara near you, a Sunday will come when it is worth taking the children — not as tourists, but to sit in the row. Let the floor do its work.