This activity should be nothing new to you and your little one. Sorting objects is a skill that starts to really take off around the age of 2. By 5, it's usually pretty well-developed, and it's important your child can sort effectively and with confidence by the start of the kindergarten year. It's a foundation principle of pattern recognition, which in turn is a foundation principle of math [source: PISD].
On the first day of school, your 5 year old should be adept at sorting objects by color, shape and size, and at least beginning to understand how to group by traits like texture and weightiness.
Next, it's about communicating ...