Whether it's in the middle of playing a game, watching a movie, or even during a walk, Benjamin has the ability to fall asleep at any given time. The only time he doesn't like taking a nap is when he's told to do so. But in general, he just sleeps a lot. There simply isn't a huge incentive for staying awake when Daddy is always around to carry you anyway. *shrugs*
And yes, that's a plush-seahorse.