This is a simple skateboard script that was pulled from https://github.com/DimitriTimoz/ElectricSkateboardFiveM the only changes I made to this script is making it so the skateboard is an item and not used by a command.
Add the image into your qb-inventory images folder.
["skateboard"] = {["name"] = "skateboard", ["label"] = "Skateboard", ["weight"] = 1425, ["type"] = "item", ["image"] = "skateboard.png", ["unique"] = false, ["useable"] = true, ["shouldClose"] = true, ["combinable"] = nil, ["description"] = "A cool skateboard!"},```