Eggs come in different sizes. Eggshells are porous .
Eggs roll in a funny and wobbly way.
Measuring things helps us find out exactly how big or tall something is. Eggs may look like they are the same size, but they aren't. We can measure the vertical and horizontal lines of eggs to see just how big they are. Eggshells are porous so that air get in and out of the egg. Many objects roll.