Humongous Entertainment has released the first two CD-Roms based on Nickelodeon's animated/live-action series, "Blue's Clues." "Blue's ABC Time Activities" is available for U.S. $19.99 and "Blue's Birthday Adventure" is $29.99. Both titles are Windows and Macintosh compatible, and feature games and educational activities aimed at 3-6 year-olds. The games are the first releases to come out of an exclusive, five-year worldwide deal with Nickelodeon.