I just had a thought - I haven't seen any coloring book that is spiral bound like a notebook. That would be a nice feature to have so one can take the book outside or on the go and not have to use one hand (or something heavy) to prevent the wind from blowing pages up and to keep the book laying flat on a table or lap so you can color more easily.
Staedler markers are on my wish list for next time
Staedler markers are on my wish list for next time