13yo's usually have plenty of ambition to develop their minds, and have plenty of energy too at that age. Programming is very satisfying, it is sorta like building something. You develop part of the code and see it working. Later you develop more, and see how what you already developed is part of the whole piece! :)\nHere is a couple websites about programming! \nhttp://www.programmingtutorials.com/\nhttp://en.wikipedia.org/wiki/Programming