Estimation is a numeracy activity that you can teach anytime and anyplace. For instance, if your children help you prepare dinner, you can have them estimate how many napkins your family might need, how many glasses of lemonade your family will drink at dinner or the number of carrots you will need for the appetizer. After dinner, you can ask your children how close their estimates were.
Something as simple as counting can be a numeracy activity. People count things almost every day. They count money, buildings along a street or the number of people in a room. Help your children get used to counting by having them count their toys before putting them away or counting the number of people in line at a fast food restaurant.
When children are fully aware of the purpose of time and how it works, it is easy for them to understand how long something will take. So try to increase the frequency of your discussions with them about time. This way, they will be able to tell when a TV show or a football game is about to end. They will also be able to tell if it's already close to bath time or bedtime.
Baking involves precise measurements. This is why baking is an excellent training and activity for numeracy. If you bake with your children, they will not only learn how to measure things such as half cups, half tablespoons and the like, but they will understand how to systematically follow instructions.