So far we have My Book of EASY MAZES
Straight from the website:
THE KUMON METHOD is what makes our Workbooks so unique and effective. This Method is a proven learning system developed in Japan to help each child reach his or her full potential. Concepts are introduced in a step-by-step manner that allows the child to master each in turn without getting frustrated. Before long, children gain confidence in their abilities and are motivated to learn on their own.
I love that each page builds upon the last and the activities get slightly more challenging each time. There is never moaning or groaning at my house when I bring out these workbooks.
For more information or to order head over to the Kumon Publishing website.