Can someone help me with using "Parents" and "Children"?

Say that in my ROBLOX Studio Explorer Window I see the following:

Workspace
	Terrain
	Camera
	YourBasePlate
	ButtonBrick
		YourButtonScript
Players
Lighting
ReplicatedStorage
ServerScriptStorage
StarterGui
StarterPack
Debris
Soundscape

Note: This was formatted in the form of a script to make visible the paths of Parents and Children

All or these are descendants of the "game". Things on this directory like "Workspace" and "Players" are direct children of "game". It is like one big family. "Workspace" is the child of "game", and "Terrain" is the child of "Workspace". Your building parts and your scripts will usually be in the "Workspace" family as you can see with the brick named "YourBasePlate". If you wanted to make a button brick, you could have your "ButtonBrick" in the family of "Workspace", and have a script to activate in the family of "ButtonBrick". You might make a button script like the following:

button = script.Parent
brick.Touched:connect(function(part)
	print("I've been touched!")
end)

In the first line, the variable "button" is defined. It tells the script that "button" is the script's Parent, which in this case happens to be "ButtonBrick". The second line tells the script that if the brick is touched, trigger the function. If the function is triggered, the script will print "I've been touched!" to the output window in ROBLOX Studio. The final line closes the function, and thus finishes off the event.

tl;dr: Parents and Children act like a big family tree. You can refer to the Parent of an object with the ".Parent", or even go further up the hierarchy with something like "script.Parent.Parent". Parents and Children just are the way of organizing objects and services in the "game" directory.