The Motion Maths apps are clever apps that remind me of some of the early enterprise games that came out on the Commodore 64 in the 80's. They are engaging, fun and actually addictive. The concepts, expectations, thinking skills, economic issues and organisation skills that a user experiences and deals with along the way with out a doubt make this a very educational series of apps. These actually opitimise educational gaming as the student user will probably forget that they are doing Maths and learning.
Check out Motion Maths: Pizza as well if your child loves Motion Maths: Cupcakes.