With 13yo, I'd go straight to Python. Perhaps start with some drawings with the turtle, and add loops for complex shapes and later recursion. Also, do some mat

With 13yo, I'd go straight to Python. Perhaps start with some drawings with the turtle, and add loops for complex shapes and later recursion. Also, do some math calculations that require "for". From recursive series to brute force problems with small integers. --- I'd recommend HTML+Javascipt only if she wants to make a few interactive webpages, with a few text fields and buttons. I'm not sure how hard is to do that in Python.