Play counting games with young children. Count along with them. Quiz each other on problems. Kids love counting as high as they can. I think we sometimes underestimate how much kids like knowing stuff.
Educators say just about every situation has an opportunity to use math principles.
Include children in the math required to follow a recipe. Discuss fractions by cutting a pie in half, into quarters and eighths. Plot the distance of a family vacation and figure out how much gasoline will be needed. For a hands-on lesson on ratios, look no further than a cookbook. If a cupcake recipe calls for one egg and two cups of sugar, the ratio of eggs to cups of sugar is 1 to 2.