Another great way to learn is often to simply listen, because people in general can teach us a lot.
The brain may also be stimulated by discovering new sensations through new experiences, healthy foods, physical exercises and relationships.
Interacting with others provides stimulation, friendships, feelings of love and happiness, as well as many new learning experiences.
A stimulated brain is a happy brain!
"Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young."~ Henry Ford