A strange particle is a really tiny thing that is part of atoms. It's so small, you can't even see it with your eyes. Imagine if you could go inside a toy block and see what it's made of - you would find lots of tiny little things called atoms. Each atom is made up of even tinier things called protons and neutrons. Now, the strange particle is one of the building blocks that makes up these protons and neutrons.
The strange particle is actually a type of subatomic particle. These particles are called "strange" because they behave in a way that is different from the other subatomic particles. In fact, they were first discovered because they would stick around for a lot longer than other particles! Scientists thought that was pretty strange, so they named them "strange particles".
The thing about strange particles is that they don't exist on their own. They are always found inside other particles. Researchers have discovered many different types of strange particles, and they all have their own special properties. But what makes them really interesting is that they can turn into different types of particles. This happens when they interact with other particles in really high energy situations, like in a particle accelerator.
So, to sum it up: a strange particle is a really tiny thing that makes up the building blocks of protons and neutrons. They behave in a strange way and can turn into different particles when they interact with other particles.