How to enlarge a player's head when clicked a button?

I have created the button and the button works. But I cannot make the head of the player that clicked the button grow.

I also want other players to see the enlarged head

local Character = game.Players.LocalPlayer.Character
local head = Character.Humanoid.HeadScale.Value
head = 1



game.Workspace.BigheadEvent.OnServerEvent:Connect(function()
    local headGrow = head + 1
end)

This is in a regular script under the BigheadEvent (a remote event)