The little ball disappeared for a few days and in the meantime, Isaac found a similar toy in the cat toys: a blue and white ball with a small gray mouse inside. I couldn't be one to let my son play with the kitty toys, so the next time I was at Tar.get, I found a set of 4 larger foam balls: one basketball, one soccer ball, one baseball, and one football.
HE LOVES THEM!
And he is already showing signs of being a sports enthusiast:
And you can be sure his Daddy is THRILLED. :)