I was a bit stumped by a couple of these challenges, but in the end I think I accomplished them.
http://inkyimpressionschallenges.blogspot.com/ asks for yellow, pink and green - I have various shades of these colors.
http://ribboncarouselchallenge.blogspot.com/ is an inspiration challenge - lots of swirly colors, many of which are included here.
http://www.thepixiecottage.blogspot.com/ - I chose the button and bow option.
http://paperprettiesblog.blogspot.com/ - use of die cuts was not a problem!
http://www.cinspirations.blogspot.com/ has what was for me a challenging layout.
I used a stamp from a tiny dollar set. The birthday greeting is from the cuttlebug folder - I found a line that worked, and inserted the strip part way. Then I put in the other end of the strip - result is upside down but I figured that would work. The circles are dies from a couple of different sets, and I finished with a button tied with twine, over a strip of ribbon. The green mat is also embossed, with circles.
The verse inside reads: Things could be worse. We could be trying on bathing suits. (I added) Have a happy birthday anyway. I have so many customers who love humorous cards, so I try to have a good supply on hand.