I think the Fred Rogers Company is happy to get whatever audience they can. As an adult collector the thing that bugs me is the scattershot arrangement of episodes- an episode from this week, and episode from that week, with little or no continuity. But on second thought I feel like that would be equally frustrating for a kid, who would become invested in the story or themes and want to know what else would happen. I think the most likely audience they are targetting then is the casual fan, who remembers Mr Rogers from their childhood and wants to share it with their kid, but wants to see a wide array of episodes and themes.