Try this game:
Make four large cards, each with a picture of an animal (I chose dog, cat, iguana, hamster, rabbit, and fish). Put them up on the board, and have the kids close their eyes. While they're not looking, hide a post-it under one of the cards, and then tell them to open their eyes. Using the expression, "Do you have a ________?" they can guess which card has post-it behind it.
I divide them into three groups and give them up to three chances (one for each group) to guess the correct card, with 1 to 3 points depending on how soon they get the correct answer.