How do they do it?

How do they do it? How do the creators of these cartoons know how to hold children's attention for so long? It is amazing! Ashlyn never sits still, but once I turn to channel to Noggin to watch Sesame Street, Barney, or any of their shows she is completely focused on the TV and nothing else. She sits so still! I don't know how they do it, but I sure do thank them. I can turn the TV on and let her watch some shows while I clean, and I know that she is glued to her chair the entire time. Thanks Noggin!