use a trapdoor brick
I didn't make Minecraft.
You have to have a mod (modification) to make a cannon. It is not in vanilla minecraft.
how to make a fire works in minecraft 1.5.2
you can't make a pencil in minecraft, but there mite be a mod for it.
right click to open/close it will also work with redstone.
Yes, it is possible to build one, using water blocks, redstone and pistons. But there is no way to craft make one just by crafting on the crafting table. There are many how-to videos on Youtube.
trapdoor spiders
the trapdoor of the larynx is the epiglottis
use a trapdoor brick
your trapdoor was made in 1883
I didn't make Minecraft.
Trapdoor spiders are arachnids not insects and they are inverts.
your trapdoor was made in 1874
You could use a trapdoor and attach it to a wall, set horizontally.
There are no keys in minecraft!
how to make a fire works in minecraft 1.5.2