Why lisp? Kid should have learned assembly, or better yet; pure math. Now he is corrupted already.
Why lisp ? Because you want to give him the best possible tool for computing and ruin his (possible) future career, where he will be forced to work with people that like java and/or javascript.
(Downvote me all you want... :P )
Why assembly? Give the kid a magnetic needle and he'll soon learn to flip his own bits.
Give the kid Emacs, the language doesn't matter :P
This "kid" here started Lisp at around 29. Some 18 years after starting programming, and well into a C++-based career. You can come around late.