It would make this application more affordable if you could purchase individual modules for different skills at different levels. Many of the other applications that she uses does it this way for $0.99 to $2.99 per module. This would allow you to see what skills are most desirable and would make it much more affordable and flexible of an application. You can offer bundling of skill levels at a discount or sell them individually. Each skill at each age level would be 1 module. I think if you would do the math, you would find this to be much more profitable, and it would give parents more control over what they are purchasing.