We have been eating guacamole every night and I wanted to make use of the avocado seeds. So, I decided to plant them....in soil (It was late and I didn't want to turn on my computer and search how to plant an avocado seed). The way you're supposed to do it is like this:
Edible Tropicals knows the real deal
But I had no toothpicks and was too lazy to go get it, so I made my own device out of water bottles.
I turned the bottle around and rested the seed on the mouthpiece and ta-da! it actually works. However, I'm not sure if you're suppose to actually poke it to make it sprout, so all you experts, let me know!