Popsugar Family Kid Parties Boys Birthday Party Themes 55 Fun Themes For Your Boy's Next Birthday Bash! August 15, 2017 by Lisa Horten View On One Page Photo 19 of 55 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 19 A Post Office Party For the tot who can't wait for the mail carrier to arrive each day, this first-class post office party is a way to ensure he's signed, sealed, and delivered on his big day. Source: Allison Kaharick for Crossing the Bugger-Dixon Line Previous Next Start Slideshow Kid PartiesKid ActivitiesBirthday PartiesBirthday Cakes