This PDF file is a worksheet for making patterns. There is a big snake on it which is divided into parts. The directions say: "Starting at the tail, make a pattern with your crayons."
As an extension, you can have your students write down what type of pattern it is - ABAB, AABBAABB, ABCABC, etc. Enjoy!
I also have two other similar worksheets - one is a snake and the other is a worm.