My friend Jane just had a baby, yay! I made a girl and a boy card in anticipation as I didn't know which she was going to have; it turned out that she had a daughter.
I went with the traditional pink theme and used a pink card blank, and cut a rectangle from a piece of printed backing paper that I thought would make a nice contrast. The swaddled baby, the small heart and the larger heart with the word 'baby' are made of wood, and all came from the same sticker pack. I think cards look nice where they are symmetrical and elements are within the lines but it can also look good to cross lines and borders, like I have done with the 'baby' heart which cuts through the border. The border itself is a silver outline sticker, as is the 'congratulations' word.