Nooby question: How to target player?

In ROBLOX a Character is actually a Model - a collection of specific Instances such as Part, Humanoid, etc...

There are multiple ways to identify whether any given Model is a Player's Character, but the 2 most popular are:

1. Seeing if the Name of the Model is one of the children of game.Players, as in if game.Players[model.Name] then (jav2612's answer)

2. Seeing if the Model contains a Humanoid called "Humanoid", as in if model:FindFirstChild("Humanoid") then

Checking if a specific Part is a Player is slightly different because you need to check whether the Model that it belongs to is a Player's Character, rather than the Model itself - but this is easy to do with the Parent property!

You could also write this as a function so that you can easily check if a brick is a constituent part of a Player's Character from elsewhere in the script:

function IsPlayer(part)
    if part.Parent:FindFirstChild("Humanoid") then return true end
    return false
end

--You might use it like this
if IsPlayer(someRandomPart) then 
    --someRandomPart belongs to a player!
end

brick = TheBrick
players = game:GetService("Players")

if players:FindFirstChild(brick.Parent.Name) ~= nil then
    print("Le brick is a player.")
else
    print("Its just a brick....")
end