AB Pattern with Reptiles and Amphibians

An AB pattern is the simplest repeating pattern: two pictures alternating, over and over. This worksheet sets up such a pattern with reptiles — like a frog, a snake and a turtle taking turns — and asks the child to continue it by placing the right picture in each blank wagon. Recognizing the back-and-forth rule and extending it builds pattern-awareness, a foundational Kindergarten readiness skill. There are no numbers, just the repeat.

The skill an AB pattern builds is prediction from a rule — the child sees the start of the sequence and works out what must come next. For Kindergarten that is core readiness thinking, and a clean two-picture alternation of reptiles rehearses it without numbers, keeping the focus on the repeating rhythm.

Children who get the hang of the AB back-and-forth start predicting the next picture at a glance, and finishing a clean alternating train feels satisfying, a small and clear early win. When this feels easy, try the pattern in ab pattern with shapes, or ab pattern with thanksgiving. You can also browse every pattern worksheet or the whole kindergarten collection — each sheet prints cleanly or plays online for free, and the more two-part patterns a child completes, the readier they are for patterns where a picture starts to double — the natural next step up the ladder.