Dot to Dot Book Combined Volume

This is the best Dot-to-Dot I have found, especially for approximately 5-7 year olds. We are on our 2nd book, as the first one was used up by an older child, and my 5 year old was ready to go with a new one! There are multiple dot-to-dot pictures on each page which are color coded to keep them straight. There are ABC and numeric dot-to-dots and it is a big thick book which keeps them busy for a long time. Other dot-to-dot books my kids have "burned through" in one or two sittings, but not this one!