We did spring patterns in ice cube trays with small Easter erasers from Target! I used these as a center when the students finished their work. The students could work in partners to copy each other's pattern or they could work individually. They loved using these colorful erasers. Once they got bored, I pulled out the dice for them to roll a number and pattern that many erasers.6
I bought the ice cube trays at the 99 Cents store in September. I bring them out monthly and use some sort of seasonal item that I can use as a math manipulative to pattern. This is as fun way to practice patterning in kindergarten!