There are patterns everywhere in the a preschooler's world - the key is helping preschoolers to begin identifying them through fun and engaging activities or opportunities.
Why should you introduce patterns?
Learning to recognize and create patterns helps cognitive development and is a basic component of mathematical and organizational thinking. As preschoolers learn to see patterns in their world, they will be setting the foundation for higher level thinking such as viewing patterns in numbers (5, 10, 15) or patterns in graphs and charts, patterns in organizing their toys, and so forth.
The picture to the left is an example of an AB pattern. There are actually two patterns going on in this picture. Your preschoolers may see the pattern in colors first (red - orange) then notice that there is also a pattern in fruit (apple - orange). As students become confident with AB patterns, you may choose to try AABB. Stick with AB patterns (patterns with only two attributes) before adding a C.