You can sharpen a pencil, by using a blade, or your own teeth! You can use a blade, and scrape the wood, so that the lead comes out. You can also scrape it off with your teeth.
Pointy thing that makes lines!Also known as a Shabalaba. (sha-ball-a-ba)
It is still a pencil, but you can't erase the coloring completely if it's a normal color pencil.
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They're called lead pencils because the graphite that pencil "leads" are made from looks like lead, so that's what people thought it was.