Yeah, so, The Boy loves his jumperoo.
See for yourself.
He never really took to the swing or the vibrating chair, but man oh man, he loves the jumperoo. On the weekends, we get up when he gets up. We change his diaper and feed him. Then we put him in the jumperoo, and he is so happy to jump in that thing for the entire morning while we drink coffee. In other words, the jumperoo is considered the greatest invention of all time in this house.