You're probably right to be concerned.

How old are they?

I remember when I was 8 years old being excited to watch Monday Night Football. I never missed it. I don't think anyone else in the family cared.
I'd watch at least one full game on Sunday too. By the time I was 11, I listened to every BYU game on the radio with my dad except for the bowl games because they were actually televised. Those were exciting times.

These days, kids needs more flashing lights to stay interested.