A game I used to practice various vocabulary, plural and singular, and there is/there are with my 6th grade ESL class (great for other grade levels too though).
Students look at a photo for a short period of time (I gave mine 45-60 seconds, but you could do more or less) to look at a photo and write down as many things as they can that they see in the photo. Then students counted how many items they had. The student with the most items was the winner of that round.
You could also play this in teams, or do a round for a warm-up or closure activity.