Polka Dot Cake

I saw this cake on one of my favourite cake blogs, i am baker, and knew I HAD to try it sometime.  That sometime finally came in January of this year, for the family birthday party.  It was a hit, and I'd love to do it again and again, 'cause it's pretty neat looking.  But I end up with so much left over icing, because of all of the colours required. And I'd need to buy a few more grass tips.