Sudoku Crunch for Kids!
The player has the option of seeing illegal moves; when this is selected, the square where the player is placing an object will glow green or red: red squares may not be used, and green squares can be used but are not necessarily correct. There are three possible difficulty levels - Beginner, Intermediate, and Advanced, and the player can choose to play a timed game. There are hints and tips if desired, and the help screen explains the rules and how to play, as well as giving a brief history of the game. Puzzles may also be printed out for later solving; possibly a better solution than using the hotkey the game provides, to hide the game instantly for the player who is supposed to be doing other things.
DJP Mom (11121)