Happy Jackson ‘Thirteen Today’ Card Make turning into a teenager even more exciting for your loved one with this card from Happy Jackson. The front of the card reads: ‘HAPPY BIRTHDAY 13 THIRTEEN TODAY watch out world…OFFICIAL teenager on the loose!’ The card comes with the message; ‘ have a great day’ written inside and has plenty of room for you to write your own message as well. Happy Jackson Cards Suitable for a range of occasions, Happy Jackson bring you a range of fun, colourful and cleverly worded cards sure to make you, and the recipient of the delightful card smile. The card comes with an appropriate message written inside in case you’re stuck for something to say! The vibrant yellow envelope means your card will stand out in the pile.