13th Birthday Card - Milestone Birthday Handwriting Red Heart

They’re finally a teenager—cue the big feelings and even bigger celebrations! This handwritten 13th birthday card is a sweet and simple way to mark the milestone. Featuring thick black marker-style lettering and a hand-drawn red heart, it strikes the perfect balance between cool and heartfelt. Whether you're celebrating your kid, niece, nephew, or best friend's teen, this card says "happy 13th" with style. It’s blank inside for your own message—funny, sappy, or somewhere in between.

Designed for teens who don’t want glitter or cartoons, this 13th birthday card keeps it modern and real. Pair it with a gift card, journal, or candy stash for extra cool points.