How do you make an "Interact Tool"?

Well what's in apacalypse rising, I'm assuming, is just those objects that you can 'pick up' just have clickdetectors in them, and that the tool just inserts a value somewhere when selected;

script.Parent.Equipped:connect(function()
    a = Instance.new("StringValue",script.Parent)
    a.Name = "EQ"
    script.Parent.Unequipped:connect(function()
    script.Parent:FindFirstChild("EQ"):Destroy()
    end)
end)

And that those objects that you can pick up have a script inside the that's something like this;

scirpt.Parent.ClickDetector.MouseClick:connect(function(plr)
    if plr.Backpack["Interact Tool"]:FindFirstChild("EQ",true) then
        script.Parent.Parent = [Wherever the item gets stored]
    end
end)

These are all guestimations but that's how I would go about doing it.

-Goulstem