You simply cant in normal gameplay but there are lots of mods for it.
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There are a lot of ways you could build an elevator in Minecraft. The most popular is the "piston," or "redstone elevetor." You can just search "How to build a simple elevator in Minecraft" on Google or YouTube if you like. Sorry, but I think it's probably too much information to tell through Answers. Good luck! :)
Elevators fail because there just aren't any items that allow you to make an elevator. One way to make a good working elevator is to get the Ugo Craft mod. It adds several blocks that can lift or rotate the blocks connected to them. A good idea would be to make a hidden underground house with an elevator leading down to it
To learn how to make an elevator on ROBLOX go to: http:/wiki.roblox.com/index.php/How_To_Make_an_Elevator.
I didn't make Minecraft.
you can't make a pencil in minecraft, but there mite be a mod for it.