Happy Jackson Make My Heart Go Boom Valentine Card Send your valentine a romantic (and a bit saucy) message with this striking Valentine’s Card from Happy Jackson. The message on the front reads: VALENTINE YOU MAKE MY HEART GO BOOM! (and other bits of me do some pretty interesting stuff too!)   Inside, the card reads: HAPPY VALENTINE\'S DAY   The card measures 15cm x 17cm and comes with a white envelope. 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.