Crayola has a nice section of its site that is devoted to the Art of Childhood and the skill of Creating Imagination. For a fun challenge, take up the 52 Creative Ideas for 52 Weeks. You will also find tips, activities, art-room setup.
I thought this summed it up nicely..."Raising a child. It is not a science. It's an art. A mysteriously delicate balance between holding tight and letting go. Building structure and removing obstacles. Unwavering standards and unconditional love. By parents. By teachers. By anyone who has ever given a child the tools they need to create character with. To create confidence with. To create dreams with. To create their masterpiece with: themselves. That's the Art of Childhood..."