My kids enjoy discussing birthdays and how old they are. I often hear questions like, "If I am six (or seven, eight...) how old will Josiah and Beth be?" It is a good way to practice adding or subtracting by twos. The other day Robert asked Josiah, “How old are you going to be on your next birthday?” Josiah held up 4 fingers, and Robert replied, “That’s right. How old do you want to be?” Josiah quickly answered, “69”.