Children used different activities to find errors in repeated patterns, some children had to find the error using colour bears some had picture cards and had to identify the error and others used lego bricks to help them find the error in the repeated pattern.
Finding errors in repeated patterns is a crucial step in developing early mathematical thinking in Early Years children. It helps them understand the concept of a "unit of repeat" and strengthens their logical reasoning skills.
This helps the children with- 
Pattern Recognition: It reinforces their understanding of what a pattern is and how it repeats.
Logical Reasoning: It encourages them to think critically and identify what doesn't fit the established rule.
Problem-Solving: It provides a hands-on opportunity to fix mistakes and see the immediate result of their correction.