From the series Ripples. A NASA physicist relates the lives and thoughts of children to the thinking processes of professional scientists. He asks whether children would rather eat a coat or an apple? Would they rather put on pairs of roller skates or coats to keep warm? How do they know? And then he shows how people use past experiences to build pictures that help them predict future events. He also shows how children learn to predict through other people's experiences and even how they can use mind pictures to understand things that cannot be seen at all. Finally, the scientist suggests reasons why scientific thinking is useful for a child with a problem and for grownups who want to solve the problems of the world.