Robots are appropriate for any occasion. They are neutral but friendly so you can use this card for birthdays, get well soon, congratulations on your new baby, good luck on your exams, anything!
Sometimes the simplest ways to say "I love you" are the most effective.
Available at: Papire http://papire.tumblr.com/post/490921155/animal-index-markers-designs-bear-dog ($1.80)
This is the perfect card to thank a friend for a lovely dinner party. Look how happy that cat is to have eaten such a delicious meal!
How are those letters coming, cuties? This is a serious stack of adorable here. http://stuff.icanhascheezburger.com/2011/07/29/cute-kawaii-stuff-lets-get-writing/