Guest post by my son below.
1) Decide what you want to make, and decide how you're going to make it.
I decided to make a coin with a trident on the front and a lightning bolt on the back with the gods names on it.
2) Discover Tinkercad.com and take lessons for 3D printing at the public library for the basics of learning how to print.
So,I searched for a trident and a lightning bolt and pressed “save” on both of them.
5)I had the coin from search and I got the words and went to “design” and right clicked it and pressed “paste” in a random space and the lightning bolt appeared and I put everything together. But I might of had to raise some stuff to get it higher on the coin so it would show.
6) I went to the library and printed it.