Map Puzzle U.S.A. app for iPhone and iPad

This application program is for the childs education.
It is a puzzle made to remember states in United States of America.

How to play:
The puzzle piece that comes out at random is moved to a correct place on the map.
When you set the puzzle piece to a correct position,
"Prefecture name" and "Mark of the prefecture" are displayed.
The puzzle piece comes out when "ok" is pushed.
It continues until all the puzzle piece becomes complete.

Features:
In the mark, there are English and Japanese Katakana.
If it is iPad, the piece of puzzle never goes somewhere. it can enjoy only on the screen.
Because it is set questions completely at random, states can be remembered by repeatedly doing.
There is no user interface where the child causes the malfunction.
It is a very simple puzzle.

And... It is useful as adult and childs communications tools.