Okay, so I can't stop talking about yo-yo's. It' s not that I personally have made a lot of them or am overwhelmingly infatuated with them, but once you start looking into them, they just seem to find you. Sunshine Harbaugh over at Sunshine's Creations has done a lot with them. To see her yo-yo posts all in one spot, you can go here. She's got a yo-yo Shamrock tutorial (made from the heart tutorial, and also an Easter Egg tutorial.
And if that's not enough, there is a whole group called Ga-Ga for Yo-yos who post pictures of all of their yo-yo creations.