I do not have any photos right now of the finished tree because I cannot travel through time. I will submit sideshow on the growing tree when it starts growing.
What you need:
Something that will cut a Styrofoam cup
...and water .-
Step 1: Find a Seed
To harvest the seed, simply cut the avocado in half ( widthwise or lengthwise,it does not matter) and GENTLY scoop out the seed (with a spoon, dork). Be sure not to severely lacerate the seed in the process of cutting the avocado in half.
Step 2: Tooth picks
It should look like this:
Step 3: Containment
It's difficult to explain so... Do it like this.
Step 4: Very Important!
The tooth picks act as a stand to keep the avocado from touching the bottom of the container we just made.