I thought this was a great idea. Meditative, mindful and relaxing. I've downloaded some mandalas to colour. 
http://www.theguardian.com/commenti...uring-in-adults-free-your-mind-play?CMP=fb_gu
http://www.theguardian.com/commenti...uring-in-adults-free-your-mind-play?CMP=fb_gu