It's brothers vs. sisters, as friends Conor and Carter take on their big sisters Kelsey and Chadwick, and take a chance at redecorating each other's playrooms.

Conor hopes the luck of the Irish will be on his side with big sis' Chadwick in charge of the decorating. With the help of designer Scott and carpenter Barte, Chadwick and her friend Kelsey put their sibling rivalries aside and transform Conor's dull playroom into an Irish castle fit for a king — or at least for a little brother who thinks he's king. Stone walls, a real suit of armor, a fireplace with a mantle for extra storage and Conor's family colors and crest accent his new room. There's even a secret turning wall with a TV on one side and a majestic throne on the other so Conor can hold court while he's hanging out with his friends.

Carter's big sister Kelsey hopes her "style-challenged" brother is up to transforming her room, but it'll take the help of designer Jordin, carpenter Ginene and Kelsey's love of Chinese culture, food and colors for little brother Carter and his friend Conor to conquer her dreary digs. Watch as they create a sophisticated "Imperial China" playroom for Kelsey, filled with Chinese tapestries and symbols for the walls and ceiling, red silk for her couches and an entertainment center shaped like a Chinese food takeout box. The boys even baked fortune cookies with personalized (albeit brother-friendly) fortunes.