Unlike ASK's other education programs, I am less than satisfied that this is worthy of the title educational. It is a computer implementation of a reasonably good number puzzle of a long history.
You chose, or have given, two single digit numbers and have to form a whole range of other numbers from them in order to save Cranky's circuits from the rain.
The idea has been used in schools for some time but not with such a range of numbers to find. There are just too many to provide interest for younger children.
There is very little teaching or error correction, although it is very well error-trapped. I really cannot see how anyone would want to subject a child to such a boring treatment of such a simple idea. Maths is an exciting subject and should be taught as such.
I would advise parents to be very sure their children need plenty of number crunching practice before using this program. Very disappointing from such a forward-thinking software house.