We love a Halloween costume that can easily be modified for a group, so when creating our kids zombie costume, we thought it could be fun to base it around a fictional place called "Zombie Academy," a place where lots of little zombies abound. (Although they won't get extra credit for donning this costume, they might get extra brains.)
A plaid school uniform is easy to find and affordable when sourced from charity shops or big box stores. You can also use clothes from their existing wardrobe, even if they're ill-fitted, since the idea is to rip and tear them for a worn look. To make it extra special, we've created a crest template so you can customize the costume for your group of growling green zombies; for securing it to their shirtfront, we used hot glue but if you would rather sew it on, that works, too. Add a personalized treat carrier that spells out the word "BRAINS," and they're ready to gobble up candy all night long.