One activity my kids love is making patterns with colored macaroni. I use different shapes and colors. Right now you can get pumpkins and harvest macaroni. They make a pattern with the macaroni and glue it onto a strip of construction paper. I start out with simple 2 color patterns using beads.
Kids love to make bead necklaces.
We do patterning with those cubes that stick together and and anything else they play with in the room. I also use worksheets where they have to finish the pattern and color in a pattern. Hope this helps. I have done an entire unit on this, but this year I am doing it all year long. We do sound patterns, movement patterns, and we look for patterns in the environment.