A simple and fun explanation for kids about what it means to stamp a letter, involving sending mail and using stamps.
Okay, imagine you want to send a letter to your friend. You know how you have to give your letter to the postman so it can go to their house? To do that, you need to put a little picture on the corner of your letter called a stamp.
A stamp is like a tiny ticket that tells the postman, 'Hey, I need you to take this letter to my friend!' So when you stamp the letter, you put that stamp on it, and then it can go on a big journey to reach your friend's mailbox.
So, stamping the letter is just making sure your letter is ready to travel, just like packing your toys in a bag when you go to a friend's house!