Relaxing

I was placing a book order through the Chapters website and came across this odd 'scratch art'. I've never heard of it before, but apparently it's a thing that is gaining popularity.
I bought a couple, but the one I started with is the Nature themed book by Sterling. The book was around $14 and comes with 8-10 nature pictures, the paper is thick card stock and it includes a wooden stylus which you use to scratch the grey pattern on the picture. As you scratch away, the bold colors are revealed and when finished you have a beautiful picture. It is very relaxing and I like that it's instant gratification, I can see the progress I've made as I go and it's beautiful. This book is easier to color compared to another book I bought called "Cities", which is extremely detailed almost to the point that I am considering returning it as it's too advanced for my abilities.
A tip is to press lightly on the stylus, and pull towards you, it's easier and you have more control. If you go out of the lines, it's shows and also remove any bracelets or watches, as they can scratch the picture. I am in love and am going to order another book by the same company called 'Under the Sea, plus I brought my book into work today and I've got all my co-workers placing orders too.