This delightful tune was one I first heard performed by The Penguin Cafe Orchestra. It's done here by the group "Patrick Street" and is featured in their album "Irish Times". If you feel like doing a "riverdance" while listening to this, be sure your home-office or work station is clear of obstacles like children, small pets or diminutive supervisory personnel.
A bit of Wikipedia:
"The band was formed in Dublin in 1986 with Kevin Burke (formerly of The Bothy Band) on fiddle, Jackie Daly (De Dannan) on button accordion, Andy Irvine (Sweeney's Men, Planxty) on bouzouki and vocals, and Arty McGlynn (Van Morrison, Planxty) on guitar. McGlynn later left the group, and other members were added: Ged Foley (The House Band, Battlefield Band) on guitar, and Declan Masterson on uilleann pipes and keyboards. They have also played with Donal Lunny, Bill Whelan and Enda Walsh. Jackie Daly left shortly after recording "On the Fly". On this album John Carty joined the band.
"In 2008, the furniture company MFI used Patrick Street's cover of "Music for a Found Harmonium" (originally composed by Simon Jeffes from The Penguin Cafe Orchestra), in the background of a TV advertisement. The same track was used near the end of the movie Napoleon Dynamite, as well as in the movie It's All Gone Pete Tong."