Well, sweetheart, do you know what a poppy is? It's a pretty flower that grows in gardens and looks a bit like a cup.
Now, some people wear a special kind of poppy that's purple instead of red. This is called a purple poppy.
The purple poppy is worn to remember animals like horses, dogs, and cats that have served in wars and conflicts. Just like people, these animals also helped to protect their countries and keep people safe.
So, when someone wears a purple poppy, they are saying thank you and showing respect to these brave animals. It's like a little way of saying, "we haven't forgotten you, furry friends!"