Zentangle Greeting Cards Session. Week 1: Birthday Card. What a way to celebrate someone’s birthday, with a hand-drawn, unique birthday card! Week 2: Thinking of You Card. There are many occasions when we want to send a note to tell our friends and loved ones to tell them they are on our mind. They’ll feel special when they know that you took the time to send your own creative design. Week 3: Happy Anniversary/Congratulations Card. Life is full of so many occasions when we want to join in our friends' and loved ones' celebrations. Let them know by creating a special card just for them! Week 4: Thank You Card. Those are two little words that no one ever gets tired of hearing: “thank you.” Tell them how much you appreciate them by sending a card full of gratitude! Week 5: Friendship Card. Sometimes we just want to tell our friends that we care and that we’re thinking of them. Sending them a hand-drawn card is a great way to do that! | Active participation.