if your home was built before 1978, log onto leadfreekids.org. >> when you go to see a rock band, you probably expect to see a keyboard, guitar, and drums. but a violin? zack explains. [ rock music playing ] >> meet antonio pontarelli, a 19-year old composer, singer, and musician who's playing the violin on a whole new scale. [ music continues ] >> they expect me to play classical music, and when i get up there on the violin, it's actually quite interesting to see the reaction and to kind of bring something new to it and kind of try to explore what other people in my genre haven't done. >> while most children at the age of 3 might be learning how to tie their shoes, antonio was learning how to tune strings. >> well, when i first started off, i was definitely just like any other toddler picking up a violin. i'd practice every once in awhile, but it wasn't really serious. [ classical music playing ] as time went on, i started getting more and more into classical music. >> but classical music wasn't enough. antonio wanted something a little different. >> i wanted to play the music that i