I used Fiskars Baby Clear Stamps (pictured below) as the image and sentiment on my cards.
In order to achieve the soft lacy look at the bottom of the card, I used the Martha Stewart Doily Lace Border Punch. (pictured below)
I wanted to keep the thank you cards simple. As you can see below I used just 3 colors. Pink, white and black. Here is my finished card.
I made 10 and stacked them (with the envelopes) together and wrapped a pink ribbon around them. I wanted to create unique gifts for her, instead of the traditional baby clothes and diapers that people usually give. Of course I couldn't pass up a cute outfit to give her. So so far I have an outfit, the thank you cards pictured above and the photo frame pictured here. I really hope she likes them. And now I'm off to see what else I can create for her.