Here are two sets of blank bingo cards that can be a great way to review colors. This product is a great option for ESL teachers as well as Pre-k and 1st grade teachers. The file includes one version for younger children in which they only have to color the circles in order to complete the card. The other version includes a space under each circle so that they can also practice writing the names of colors. There are also two size options. I've used this game many times before and my students love it!