Have you ever correctly guessed the number of jelly beans in a prize jar? What was your strategy? Did you estimate the volume by counting the number of jelly beans in the length x width x height as if it were a box shape? Or maybe you got even closer by finding the area of the circular base of the jar times the number of jelly beans in the height. The area of the base is pi*r^2. Pi is about 3, so take 3 times the radius (half the way across the circle) times the height. At those times, share your strategy with your child at your side. It will motivate them to learn about volume in math! The point is, whatever math you use can and should be shared with your children. Make it fun--it might even pay off with a jar of jelly beans!