I used to be a Kindergaten teacher and my students sang "I īm a little Leprechaun" to the tune of I īm a Little Teapot.
 
I īm a little leprechaun dressed in green 
the tiniest man that you īve ever seen. 
If you ever catch me so it īs told 
I īll give you my pot of Gold! 
 
 
Green Song (sung to the tune of "Bingo") 
 
There is a color 
That we wear 
On St. Patrick īs Day 
G-R-E-E-N 
G-R-E-E-N 
G-R-E-E-N 
And Green is that color 
 
http://mailjust4me.com/play/stpat1.htm
http://www.princetonol.com/groups/iad/links/stpatricks.html
 
nice mobile
http://www.kaboose.com/HideTheseForNow/mobile.html
Snack: Eating green eggs
http://www.kinderart.com/seasons/stpatricksday.shtml
 
*I edited the post to include the site where the ear pattern can be found.  I LOVED that site!  Lots of nice ideas for crafts.