Sleepy Man Banjo Boys-Bluegrass virtuosity from ... New Jersey?

All under the age of 16, brothers Jonny, Robbie and Tommy Mizzone are from New Jersey, a US state that's better known for the rock of Bruce Springsteen than the bluegrass of Earl Scruggs. Nonetheless, the siblings began performing bluegrass covers, as well as their own compositions, at a young age. Here, they play three dazzling songs in three different keys, passing the lead back and forth from fiddle to banjo to guitar. http://www.ted.com/talks/sleepy_man_banjo_boys_bluegrass_virtuosity_from_new_jersey What is the name of this type of music? How does this music make you feel? Did you catch how old the boys are? Did you see their fingers fly?