Children can play along with Periwinkle, Steve and Blue's new neighbor from the big city, in these two episodes of Blue's Clue's. In Blue's Big Mystery, children will become detectives as they join Steve in collecting clues about the identity of the mysterious builder constructing a fort in Blue and Steve's backyard. This episode promotes deductive reasoning, observation skills and visual perception. Periwinkle misses his old home and friends in the city in Periwinkle Misses His Friend, which promotes creative problem solving, vocabulary building and empathy.