Home / Boom / Old Enough To Know The True Meaning Of Happiness – Birthday Card Old Enough To Know The True Meaning Of Happiness – Birthday Card£3.49 Printed In The UK. Envelope Included. Send your best wishes with one of these funny cartoon birthday cards. 12 in stock Old Enough To Know The True Meaning Of Happiness - Birthday Card quantity Add to basket Related products Happy Belated Birthday Funny Belated Birthday Card £3.49 Add to basket Oh Crap Lads We’re Late Belated Birthday Card £3.49 Add to basket 40th Birthday Card For Tee-Today… Go Get A Round In! £3.49 Add to basket Here’s Your Card Humorous Football Birthday Card £3.49 Add to basket