[Eric]

I've played grammar baseball (actually kickball but it's the same with a lot less equipment and skill required) before. It was fun.

Create A LOT of questions that you want your students to answer or practice. Or better yet, have them create their own questions.

Then 1 team "pitches" a question to the batter of the other team.

If the batter gets the question right, they go to first base. (if you rank the questions in terms of difficulty, you could have singles, doubles, triples and home runs).

If the batter gets the question wrong, they "strike out".

To make this more active and physical, if the batter gets the question right, the pitcher pitches the ball to the batter and the batter gets a chance to kick the ball and try to get to first base. If the batter gets the question wrong, they strike out.

There are a lot of variations you can do to this game. Different levels of questions. Fouls for answers that were close but not perfect. Balls for questions that were not asked properly or with good pronunciation, etc...

The only requirement is that your students have a decent understanding of baseball/kickball. If they don't, forget about it! Teaching the rules of baseball in a second language is harder than teaching English! Trust me...