Is it possible to have parts that only collide with the player?

I was wondering if it was possible to have parts that only collide with the player. I'm not asking for a script or anything it's just I want to know if anyone has done it, or something similar.

I really need this feature for my game and I don't have any lead on it, so any info would help. A wiki link or a model would be most helpful.

Local parts. Place the parts in the camera from a local script. This will make all parts only visible and collidable to the player.

ahem, place this inside the brick, this may or may not work... :P also the brick will have to be extemely thick! (i dunno if it works :P)

local touching = false

    part.Touched:connect(function(hit)
    	touching = true
    	repeat until part.TouchEnded:wait() == hit
    	touching = false
wait (0.1)
    end)

if touching true then
wait(0.1)
script.Parent.CanColide = true
elseif touching false then
script.Parent.CanColide = false
end