How do I delete tools when my minigame is finished?

Hi, I've made my own minigame place and don't know how to delete the minigame tools granted to the player. It all works apart from deleting. It is messy, be warned.

game.Players.PlayerAdded:Connect(function(plr)
    print("Greetings from the developer. c:")

while wait(30) do
    local object = math.random(1,2)

if object == 1 then
    game.ReplicatedStorage.Plate1:Clone().Parent = workspace.Folder

game.ReplicatedStorage.ClassicSword:Clone().Parent = game.Players[plr.Name].Backpack
plr.Character.Torso.Position = Vector3.new(-112, 10, 142.5) 

    wait(30)
    plr.Backpack.ClassicSword:Destroy()
plr.Character.ClassicSword:Destroy()
workspace.Folder.Plate1:Destroy()


elseif object == 2 then 
    game.ReplicatedStorage.Plate2:Clone().Parent = workspace.Folder
game.ReplicatedStorage.ClassicPaintballGun:Clone().Parent = game.Players[plr.Name].Backpack
plr.Character.Torso.Position = Vector3.new(-112, 10, 142.5) 
wait(30)
plr.Backpack.ClassicPaintballGun:Destroy()
plr.Character.ClassicPaintballGun:Destroy()
workspace.Folder.Plate2:Destroy()
end
end
end)

Output on plate2: 14:11:39.238 - ClassicPaintballGun is not a valid member of Model. Does not teleport to plate though, I do not want to ask anyone to anything else apart from the problem fixing.