Here's a full version of the game.
http://www.worthpoint.com/worthopedi...eball-game-cut
The front of the box would've looked something like this.
http://www.worthpoint.com/worthopedi...al-box-animals
Here's a page with a bunch of cereal box fronts and backs. The Post Toasties Corn Flakes are about half way down. The baseball one isn't here, but there's a bunch of other Disney related material to give you a general idea.
http://www.theimaginaryworld.com/post.html