Nelson Gill captivates with his tropical tunes

"A Family Afternoon of Caribbean Rhythms" 2 p.m. Sunday Old Town School of Folk Music, 909 W. Armitage

Admission, $5 Advance registration suggested,(312) 525-7793

When Nelson Gill stepped into a nightclub in his native Belize afew years ago, he encountered a sight that set his head spinning.There was a crowd of adults dancing frenetically to "Big Farm," asong about dogs that say "ruff," frogs that say "ribbit" and roostersthat say "qui-qui-ri-qui-qui" (the Spanish equivalent ofcock-a-doodle-doo).

"Some of the people were even making the animal sounds," saidGill, who wrote "Big Farm" for kids, and never expected it to becomea hit with adults. "It made the …