Shilpa Shastra is a very old book from India that tells us how to build things. It is also sometimes called "Vaastu Shastra" or "Vastu Shastra".
Now, when we talk about building things, we are not talking about just houses or buildings. We are talking about a lot of different things like temples, palaces, parks, and even statues! These all need to be built properly so that they look beautiful and also work well.
So in this book, there are many rules and guidelines on how to build things. They tell us what kind of materials to use, how they should be put together, and what kinds of designs and decorations should be added.
For example, if we want to build a temple, the Shilpa Shastra tells us that we should build it facing east or north. It also tells us that we should use certain kinds of stones and woods, and that we should make sure the temple is decorated with flowers, bells, and other things that make it look beautiful.
Overall, the Shilpa Shastra is like a big instruction manual for building things. It helps people create beautiful and functional objects that last a long time.