Constitutional documents are like a magic book that tells us how a country should be run and what people's rights are. Just like how we have rules at home about what we can and cannot do, a country needs rules too.
Think of the constitution as the instruction manual for the government. The big bosses of a country (called politicians), use the information in the constitution to make decisions about what the government can or cannot do. Sometimes, these bosses might forget what the rules are, so the constitution is there to remind them.
The constitution has some important information in it, like what your rights are as a citizen, what types of elections there are in your country, and how the government can spend money. All of these things make sure that the government is doing its job correctly and fairly.
So, if anyone wants to make changes to the country's rules, they have to follow the rules in the constitutional documents. This is because the documents are super important and must be respected.
In summary, constitutional documents are like the rules that make sure a country is run properly. They tell us what we can/cannot do, what our rights are, and how the country's leaders can make decisions. These documents make sure everyone plays by the same rules, and we all get to live in a happy and fair society together.