what is the show that is mentioned in the first question?
It is an  American live-action/animated educational children's television series.
Blue's Clues
Blue's Clues is an American live-action/animated educational children's television series that premiered on Nickelodeon's Nick Jr. Block on September 8, 1996.
who took steve's place on blues clues Donovan Patton. who is he? An American actor, voice actor, host and singer. name some of his works? Films such as "Awake" and "Lies I Told My Little Sister",  and  television shows, such as "Blue Bloods", "Nurse Jackie" and "Damages".
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Blue's Clues [SEP] Introduction
Blue's Clues is an American live-action/animated educational children's television series that premiered on Nickelodeon's Nick Jr. Block on September 8, 1996. Producers/creators Angela Santomero, Todd Kessler, and Traci Paige Johnson combined concepts from child development and early-childhood education with innovative animation and production techniques that helped their viewers learn. The show was originally hosted by Steve Burns, who left in 2002 and was replaced by Donovan Patton as Joe until 2006. The show follows an animated blue-spotted dog named Blue as she leaves a trail of clues/paw prints for the host and the viewers, in order to figure out her plans for the day.