For a baby's first birthday, here are some playful themes that double as puns to add a whimsical touch to the celebration:

"One-derful Adventure":

Create a playful adventure-themed birthday party that celebrates the little one turning one. Incorporate elements like hot air balloons, maps, and adventure props. Emphasize the pun by highlighting how the baby's first year has been a "one-derful adventure."

"Somebunny is One":

Celebrate the baby's first birthday with an adorable bunny-themed party. Decorate with bunny ears, fluffy tails, and pastel colors. Incorporate elements like carrot-shaped treats and bunny-themed activities. Emphasize the pun by highlighting that "somebunny is one."

"One in a Melon":

A watermelon-themed party with pink and green decor, watermelon-inspired treats, and cute watermelon designs. Let everyone know that your babe is one in a melon, er, million!

"Dino-Mite First Birthday":

Transport guests to a prehistoric world with a dinosaur-themed party. Decorate with dinosaur cutouts, footprints, and greenery. Serve snacks with dino-inspired names. Emphasize the pun by highlighting how the baby's first year has been "dino-mite."

"Wild ONE":

Plan an animal-themed party featuring cute jungle or safari decorations and adorable animal cake toppers.

Remember to customize the chosen pun-themed first birthday party to suit the baby's interests and the family's style. Incorporate age-appropriate activities, creative decorations, and themed treats to make the celebration memorable for both the little one and the guests. These pun-based themes add a playful and lighthearted touch to the milestone celebration.