"Make a skill tree where when the player presses N it opens their own unique skill tree where they can spend Skill Points to unlock tools. The Skill Tree will be a GUI with buttons for each of the tools. Make 3 example tools, and make it so you have to progress through the skill tree to unlock all."

-- Local script 
local Player = game:GetService("Players").LocalPlayer
local UserInputService = game:GetService("UserInputService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local skillTreeGui = script.Parent.SkillTreeGui
local skillPoints = Player.leaderstats.SkillPoints
local tools = {"Tool1", "Tool2", "Tool3"}

local function unlockTool(toolName)
    if skillPoints.Value > 0 then
        local tool = ReplicatedStorage:FindFirstChild(toolName)
        if tool then
            tool:Clone().Parent = Player.Backpack
            skillPoints.Value = skillPoints.Value - 1
        end
    end
end

local function openSkillTree()
    skillTreeGui.Visible = not skillTreeGui.Visible
end

for _, toolName in pairs(tools) do
    local button = skillTreeGui:FindFirstChild(toolName)
    if button then
        button.MouseButton1Click:Connect(function()
            unlockTool(toolName)
        end)
    end
end

UserInputService.InputBegan:Connect(function(input)
    if input.KeyCode == Enum.KeyCode.N then
        openSkillTree()
    end
end)

-- Server script 
game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

local skillPoints = Instance.new("IntValue")
    skillPoints.Name = "SkillPoints"
    skillPoints.Value = 5
    skillPoints.Parent = leaderstats

local tools = {"Tool1", "Tool2", "Tool3"}
    for _, toolName in pairs(tools) do
        local tool = Instance.new("Tool")
        tool.Name = toolName
        tool.Parent = game.ReplicatedStorage
    end
end)