Here is an easy game for primary level students.
Materials Needed:
A small ball
At least a little enthusiasm
First put your group in a circle. The teacher then announces a topic. It can be food, animal, fruit, whatever the teacher chooses. The teacher tosses the ball to a student and the student must respond with a word from the topic. Example, if the topic is food, the student must respond with a food, like hamburger, fried rice, etc. Once they say it, they can toss the ball to any other student who must respond. If a student can not respond they must sit down and they are out. Last student standing wins.
You can vary this game by not allowing students to repeat words, etc.