How do I make my tycoon produce a mesh opposed to the standard block?

I'm making a tycoon and I need the Dropper (Part) to drop a Certain hat other than any type of regular brick here is the script im using can you please add the part with the mesh :D? (So I just need it to added where I want to put a mesh here opposed to the block and I don't know how) Code:

wait(2)
workspace:WaitForChild("PartStorage")


deb = true 
script.Parent.Clicker.ClickDetector.MouseClick:connect(function(wat)
	if deb == true then
		deb = false
			local part = Instance.new("Part",workspace.PartStorage)
			part.BrickColor=script.Parent.Parent.Parent.DropColor.Value
			part.Material=script.Parent.Parent.Parent.MaterialValue.Value
			local cash = Instance.new("IntValue",part)
			cash.Name = "Cash"
			cash.Value = 1 -- How much the drops are worth
			part.CFrame = script.Parent.Drop.CFrame - Vector3.new(0,1.3,0)
			part.FormFactor = "Custom"
			part.Size=Vector3.new(1, 1, 1) -- Size of the drops
			part.TopSurface = "Smooth"
			part.BottomSurface = "Smooth"
			game.Debris:AddItem(part,20) -- How long until the drops expire
			wait(.15)
			deb = true
	end
end)

@Spork after I did that and tested it, this showed up.

while true do
	script.Parent.Velocity = script.Parent.CFrame.lookVector*23
	wait(0.2)
end