Superhard materials are things that are REALLY tough and hard to break. Sort of like how a rock is tough and can be really hard to break, except superhard materials are even tougher than rocks.
These materials are made up of tiny particles called atoms, which are the building blocks of everything around us. The atoms in superhard materials are arranged in a special way that makes them really hard and strong.
One example of a superhard material is diamond. You might have heard of diamonds before - they're really pretty and people wear them as jewelry. The reason diamonds are superhard is because they are made up of carbon atoms arranged in a special way.
Another example of a superhard material is boron nitride. This is made up of boron and nitrogen atoms arranged in a special way, and it's even harder than diamond! Scientists are always trying to create new superhard materials to use in things like cutting tools or armor.
So, superhard materials are really tough and strong because of how their atoms are arranged, and scientists are always looking for new ways to make even tougher materials.