The 10 Best Sibling Halloween Costume Ideas

Peanut Butter & Jelly Children's Halloween Costumes ($43)

These two coordinating sibling Halloween costumes go together like peanut butter and jelly — exactly like them, in fact. The set features two identical costumes that resemble slices of bread, one with a jelly spread on top, and the other with peanut butter (or sunbutter, for kids with allergies). The Halloween costume idea is funny, unique, and surprisingly comfortable, making it a great buy for older kids and tweens who might want to wear something more relaxed while trick-or-treating.