Some are very cute, some funny..
I like Valentines day one 14th Feb 2013, that! was a lot of fun.
You press the love heart, it came up with different combinations of animals in love, it was cute.
I'm sure you have Juicylucy. If you use Google, you've seen their 'doodles' - like on Christmas day for example, the Google homepage has a different picture on it and not the standard 'Google' font you'd ordinarily see.