Hilarious Step Brothers Halloween Costume Idea Bring the laughs this Halloween with the ultimate baby Step Brothers costume! Matching wigs, argyle sweater vests, and “Hello My Name Is” badges transform your little ones into Brennan and Dale. A fun and easy DIY sibling costume that’s guaranteed to be a hit for movie-loving parents. Perfect for brothers, cousins, or best buddies! LTKSeasonal LTKBaby LTKKids