Check the listing for details. Melissa & Doug Blues Clues & You! Mailbox Play Set-27 Piece NEW Nickelodeon Kids. Color: Blue, Condition: New. Listed at 29.99 USD. The Melissa & Doug Blues Clues & You! Mailbox Play Set is a 27-piece wooden toy designed for preschoolers aged 4-7. With a blue color scheme and featuring characters from the Nickelodeon show Blues Clues & You, this play set is an engaging and imaginative addition to any child's toy collection. Made by the reputable brand Melissa & Doug, this housekeeping toy set is sure to provide hours of fun and creative play for young children.The Melissa & Doug Blues Clues & You! Mailbox Play Set is a 27-piece wooden toy designed for preschoolers aged 4-7. With a blue color scheme and featuring characters from the Nickelodeon show Blues Clues & You, this play set is an engaging and imaginative addition to any child's toy collection. Made by the reputable brand Melissa & Doug, this housekeeping toy set is sure to provide hours of fun and creative play for young children.