See who knows the memory verse, then write it up on the board. Get everyone to stand in a circle and have a ball to pass around the group. As you catch the ball you say one word of the memory verse and then pass it to another who says the next word, and so on till the memory verse is said in full. Time how long it takes to say the memory verse and try and see how fast the group can say the memory verse. Try to beat the previous time.