Molecular breeding is a way of growing plants that is similar to when you play with Legos. Just like how you can create different designs using different colored Lego blocks, scientists use special tools to change the way the plants grow by changing their DNA.
DNA is like the recipe or the instruction manual that tells a plant how to grow. By changing some of the instructions in the DNA, scientists can create new and improved plants. For example, they can make plants grow faster, be more resistant to pests, or be more nutritious.
To do this, scientists use special computers and machines to find the parts of the DNA that they want to change. Just like how you would change a Lego block, they can then edit the DNA to create new instructions for plant growth.
Once the DNA has been edited, the scientists grow the plants and see how they turn out. If the changes worked, they can then use the same "recipe" for growing more plants with those same traits.
So, in summary, molecular breeding is like playing with Legos and changing the instructions to create new and improved plants.