I need help to begin making gears and stuff?

how do I make it so if I click something or the user clicks something it will make another part explode or something because I am working for innovation inc and I need help to script gears and scientific parts please give me ideas and a possible link to a good beginners tutorial to make functions and I need to make a map regenerate itself

The best place to start scripting is always on Roblox Wiki

Here are somethings that might be of Interest

Explosion

Destroy Part

Click Detector

And if you want to make things regenerate you could try Cloning