21st Birthday Cards For Son

Cheers to 21 years of awesome! Celebrate his journey from teen to fully-fledged grown-up (well, sort of), with our collection of 21st birthday cards for sons. He might not quite have mastered the art of adulting yet, but he still deserves a son 21st birthday card to celebrate his big milestone.

There's nothing like the freedom that comes with turning twenty-one. Not only is your son free to choose what they want to do with their life, but you'll soon be able to wish them goodbye and have the house to yourselves. Celebrate your son's proper entry into adulthood with a funny or rude card before going out to celebrate this landmark age.

Our 21st happy birthday son cards are designed to add a dash of joy to his big 2-1 celebrations. From hilarious quotes to playful illustrations, our 21st son birthday cards will help your not-so-little boy kick off this milestone with a smile.

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