Okay kiddo, so you know how in some countries there's a leader, like a king or a queen, who tells everyone what to do? Well, sometimes people don't agree with what the leader says or does.
Now let's imagine a situation where a group of people get together and decide they want to do something to show they don't like the leader. Maybe they want to take over the government or stop following the leader's rules. This is called "treason."
But what if instead of just disagreeing with the leader, they work together to build something new and better? Something that will make everyone's lives easier and happier? That's called "constructive treason."
You see, it's not always just about stopping something bad, sometimes it's about creating something good. However, not everyone might see it that way, and they might still punish those people for doing something against their leader's authority.
So even though they were trying to do something good, the people who committed "constructive treason" might end up in trouble with the law.