Have you ever written a secret note to a friend in a secret code that only you two can understand? That's kind of like what Ada is, but for computers!
Ada is a special language that computer programmers use to write special instructions for computers to follow. These instructions are called "code." Just like how different languages have different sounds and words, Ada has its own set of special words and symbols that only computer programmers understand.
The reason why Ada is special is because it was designed with safety and reliability in mind. When we use computers, we want to make sure they are doing what we want them to do and not doing anything that could be dangerous or cause a problem. Ada makes it easier for programmers to write code that won't have any errors or mistakes that could cause problems.
Imagine you are building a castle out of blocks. You want to make sure the castle doesn't fall down, so you carefully stack the blocks on top of each other one by one. That's kind of like how Ada works. It helps programmers carefully build their code so that it won't "fall down" or cause any problems.
So, Ada is like a secret language for computers and helps programmers write code that is safe and reliable.