@Adám he's 24 now, but started looking at APL a few years ago. He was a Phase 1 winner this year (
dyalog.com/student-competition.htm) and also wrote a significant portion of
aplwiki.com/wiki/Stencil . I can only look on with pride :-) Anyway, we both enjoyed watching various APL videos, from the classic 1975 Demonstration video, through various Dyalog videos, to the more recent Code Report ones too.