Which math activity is suitable for four-year-olds?

Counting items in a bag is a suitable math activity for four-year-olds because it aligns perfectly with their developmental stage in early childhood. At this age, children are typically beginning to grasp basic counting concepts and recognize numbers. This activity allows them to engage in hands-on learning, where they can physically manipulate objects and understand quantity in a tangible way.

Counting also strengthens their one-to-one correspondence, which is foundational for later mathematical learning. It promotes cognitive skills such as recognizing numbers, developing vocabulary related to counting, and understanding the concept of quantity. In contrast, the other activities mentioned involve concepts that are generally too advanced for four-year-olds, as they typically require more abstract thinking and higher-level cognitive skills that young children have not yet developed.