How do I make a spawner for a tycoon game that spawns drops?

This is not a request site, try first before asking.

Though I will be helping you to get Started because I hate seeing people struggle.

First, these dropped blocks are created by the Instance.new() method.

So first, add a script into the dropper, not a local script but a server script; and we want to do something like this;

local dropper = script.Parent -- the dropper
local money = -- you have to put your currency here

while wait(5) do -- a loop, change 5 to how long it untill drops again
	local Blob = Instance.new('Part') --Creates part
	Part.Size = Vector3.new(2,2,2) -- you can change the size
	Part.Anchored = false -- so it drops
	Part.CanCollide = true -- we don't want it going through parts
	Part.Position = Vector3.new() -- Put where the the dropper is, the mouth
	Blob.Touched:Connect(function(h) -- when touched
		if h.Parent.Name == 'MoneyConverter' then -- change this to the end of the conveyer block name
			money.Value == money.Value + 10 -- change this to money if you have .Value at the end
		else
			return 
		end
	end)
end

Now there is a better way of doing this, but this is the model for you to understand what's happening. This is basically how to create blocks, this script create blocks per 5 seconds and drops. Set the position and everything and money and you will be good to go.

NOTE: Remember you can't use 'local plr = game.Players.LocalPlayer` in a server script which is a normal script

if I helped then please accept answer,

Good luck developing!