http://dcherukhin.i2p/blog/guest/p/10E5CE2CAB/attachments/COR2.html?i2paddresshelper=XeeEcrjZBSZvLCLt32HWWojBguqcQNIfCcYnLhCSpV3LHMHvq-3nkdVw3DGoJYEQnLEpbhLEH~KwUXs42auWcbRedx895ciACwHpMBnchqCYvYeqKNOnMnlZkpSGJNNSRXAcUM48WLh7v6PscDCDKQFN8KVo9n6OBm0KKQjmaQjIN3unappXVvN90d0Q6tWjftn1mTtm2Is4sYYM3glXr47IXPjTha~XW6Ex5wNqtD7pR5rNN5g5Xcpww2teT~mo52Z1xFE5g7ZgK3rHRVnShmolLNwU2VT1ZGqI5X74Tq6DPu6itln3SYyF6db-X
Preschoolers begin to sort things into categories — big and small, loud and quiet, rough and smooth, to name just a few. They discover similarities and differences in people, objects, and events.