You Will Need:
A small bag of pretzels, nuts, screws, nails, legos, or other small items
Have every family member guess or estimate the quantity of the items in the bag. Then, empty the bag and count the items with your child. After you and your child figure out the total number of items, talk about whether there are more, less, or the same amount as any family member estimated.
At first, your child may guess very high or very low numbers. However, with practice and after counting the number of items in a couple of bags, their estimates are likely to get more realistic.