Which software for a beginner person to enter the world of information technology

Hi, guys!
I just bought a new laptop for a nephew and would like to install some useful programs on it, something that may make him more interested in computing and sofware (programming, graphic design, etc.)...
Are there any programs that are suitable for a 13 year old boy who is just a pc user? I know Adobe photoshop would help him in some areas, but maybe something more serious, something that can be actually useful one day... :)
Any ideas?
Thanks!