Molecular modification is like playing with LEGO blocks, but instead of building things, we change the properties of tiny things called molecules. You know how you can take different pieces of LEGO and build different things like a car, a house or a spaceship? Scientists can do something similar with molecules - they change their structure to make new things with different properties!
Molecules are made up of atoms, which are little pieces that snap together like LEGO blocks. When scientists change the atoms in a molecule or the way they snap together, they can create new and exciting materials. For example, they can make medicines that work better or last longer, create new types of plastics that are stronger or lighter, or build better electronics that can run faster, use less power or last longer.
To change molecules, scientists use a variety of tools, like chemicals, light, heat and pressure. They can also use machines that can see the molecules, and some can even move the atoms around to create new structures. All of these tools allow scientists to change the properties of molecules in different ways, creating a whole new world of possibilities.
So just like how you use your imagination and creativity to build amazing things with LEGO, scientists can use their knowledge and skills to change molecules and create amazing new materials that can help us in many different ways.