Match the initial sound with the lowercase letter and uppercase with the lowercase letter. This bright interactive popsicle letter activity can be used in a center or small group. you have two options in setting up this activity. To make it portable, you can glue the black and white popsicles into a file folder and use velcro to attach the colorful popsicle letters. Or you can set it up on a chart stand and also have the students attach the lowercase letter to the corresponding uppercase letter. Make it work for you.