An array is simply an arrangement of something, and I love to provide tangible objects for my kids to arrange in such a way that they can SEE math happening right in front of them!
Then as we move past the counting stage, we begin talking about the different rows/columns/groups of items – adding them together to find totals:
5 + 5 = 10
Cereal squares are fun to use, but so are other objects, and literally anything goes: blocks, buttons, beans, toy vehicles, pretend animals – anything!