Bit of History, Great craft programs for kids (keeping this one in my back pocket), easy and clear explanations of shadows, light, shapes, and color and how to make them (this one is perfect for all school age and even tween audience, you might be able to sell it to a group of willing millennials;
Only downside that I saw was some of the wording on the supplies that are used are not so-commonplace anymore...but if you use your head, you'll figure out the easy replacement...for example (most people would use cardstock or even cardboard/posterboard/foam board)...the author uses a style of board that I haven't ever heard of...But otherwise, its a very helpful resource for the crafters