It’s birthday time, and your special girl deserves an equally special party! We’ve gathered 10 whimsical and fun birthday party themes to ring in her big day—and to celebrate a milestone that’s just as much about you, too. Whether you’re looking for something rustic and cozy or bright and sparkly, read on for tons of party inspiration to make the day memorable.

Mermaids Party

This party by The Celebration Society sets the stage from the moment guests enter through a sparkly paper dot hanging that evokes a magical under-the-sea setting. Purple, mint, and aqua colors saturate the scene, and photographs of the birthday girl on the table tops add a personal touch. The gigantic number 1, made using spray-painted coffee filters, looks like coral and packs an impressive punch!

What are your favorite first birthday party themes? Let us know in the comments!

— Katie Brown