While this tune is obviously geared to the celebration of St. Patrick's Day, it's fun for younger students any time of the year. It can be used equally well in a classroom setting or in a performance.
Since the song is a "question and answer" piece, you could divide your class into two parts, letting part one sing the first and third verse, while part two would sing the second verse. Both can join together for the refrain. (from Music K-8, Vol. 1, No. 4)