i Grow Potato in My Home

One day I try to grow potato in the home.so I put one potato in soil.
as a result, after some days I find this potato plant


and after some week potato was ready in soil. I click some pictures of my home potato

Look a potato but this is zooming size of potato while the actual size is given below

oh no this is also little bit zooming size
This is the actual size of the potato

i don't know why it grows too small.
Anyhow I enjoy this experience