Children are counting long before it has any meaning for them – before they realize that the numbers represent something. Because of rote memorization, children often can recite a sequence of numbers before the age of 3. One-to-one correspondence – attaching a number to each object counted – comes much later and must be modeled. Preschoolers can mark objects as they count them, but they have trouble keeping track of what they have and haven’t counted. Kindergartners can usually count at least five objects accurately, eventually learning to count six or more items by touching each item as they count.