Mojo, Puffballs are round white mushrooms, when I say round I mean round 360 degrees like a ball, I have seen some as big as soft balls and some the size of golf balls. If you cut them in half they are solid and pure white inside when they are edible. As they age, which can be pretty fast they turn brown and the inside turns to spores like dust. If you hit them with a stick or kick them a puff like smoke which are is the spores comes out, hence puffballs.