How do I attach a brick to my torso, and make it move where ever I go?

You can use welds, or if you don't want to attach it directly, use like BodyPosition and add the position you want to your position to make it follow you,

ex... c = Vector3.new(2,0,0) BodyPosition.position = person.Position + c

Use a simple welding script

local torso = game.Workspace.Player1.Torso
local part = Instance.new("Part", game.Workspace)
local weld = Instance.new("Weld", torso)
weld.Part0 = torso
weld.Part1 = part

Thats it :D Good luck