I first danced "Cotton-Eyed Joe" (a choreographed "folk" dance of the same complexity as "Gay Gordons" (for the Brits,) when I was about 4. I've been dancing ever since, and I'm now 66. When I was 11 or 12, I helped my mother teach social dancing (then called ballroom) to 5th-8th grade students (ages 9-about 14). We taught "foxtrot" (a basic box step) and a smooth waltz (as opposed to "the athletic two-step.") I currently limit myself to contradancing (what in the UK is known as barn or ceilidh dancing.) I've danced professionally and just for fun. If the kid *wants* to learn, let him! If, however, he decides to drop this interest somewhere down the line, don't insist he continue on the grounds of the money you've paid for lessons. Youngsters sometimes retain their interests into later life, but are more likely to bounce from one to another.