Making tar out of tree stumps

I have a pile of pine tree stumps in my backyard. I have been thinking of how to make use of them, and making tar came to my mind. Traditionally tar is made of very special old stumps that contains lots of tar. Anyway I had those younger stumps so I wanted to see if it makes any sense to use them. Instagram:   / finnish.playground   My friend's channel:    / kultainenmarja