Preschoolers are given a hand lens and a box of shells. They explore the shells sizes and shapes as they sort and count the shells.

Preschoolers sort plastic lids by color.  Upon completion, each child lined up their color lids and counted how many were in their row.  The children compared their height to the length of their line.

Preschoolers extend a prior sorting experience by classifying different items into groups.  Each child is given a different tray of items and need to think critically to determine ways to sort their tray.