How to make my hands size increase

Help and Feedback Scripting Support
1

So i used this script so that my arm size increase , but when i run the game there is no error and when i press the button nothing happens ,
Here is the script.

local KeyDownEvent = game:GetService("ReplicatedStorage"):WaitForChild("KeyDown1")

KeyDownEvent.OnServerEvent:Connect(function(player)
	local Rarm = player.Character["Right Arm"]
	Rarm.Position  = Rarm.Position + Vector3.new(1,1,1)
end)
2

That changes its position, try indexing the arm’s “Size” property instead.