Building is a marvelous path to learning.
Conversation often includes questions which people ask each other which requires a person to clarify their thinking. Building is an exercise that requires similar mental activities. While building, the builder is always mentally talking to themselves and asking themselves questions like: "How long does that need to be?" or "If I want two of them inside a 56 inch space, how many inches apart should I attach them?" and so on. Building implies questioning; questioning leads to learning.
