Imagination grows by exercise and, contrary to common belief, is more powerful in the mature than in the young.
W. Somerset Maugham
I have two lovely daughters who spend their time (when we shut the TV off and take away our iPhones) using their imagination. They play house, and princesses, and doctor, and on and on and on, with simple props and a healthy dose of imagination. I adore it. It's beautiful to watch their creativity and their ability to speak worlds into existence.
Sadly...imagination tends to die away somewhere around the middle of our school years in our society.