Love is in the air as Barney and all his friends gather to exchange cards and celebrate Valentineâs Day. But, little does Barney know, one of these cards contains a special invitation from the Queen of Hearts herself. Sheâs inviting everyone to come take a royal tour of Valentine Castle, where the rooms are filled with wonderful surprises. Thereâll be lots of games, songs, and sweet treats along the way. And after the children give the Queen her very own card, theyâll find Barney has a surprise waiting for them when they get home.