Easy SUDOKU with Faces!? 4x4,6x6,7x7

Easy SUDOKU with Faces!? 4x4,6x6,7x7
Do you want to strengthen your kids thinking ability?
Is it possible to train your head by doing puzzles of stone?
That is the origin of the development of this application.
I hope children would have fun playing with SUDOKU, train the brain, and acquire thinking skills.
It also becomes a brain train of elderly people.

There are 100 levels in each puzzle, so start with the one you can do easily.
Since Sudoku puzzles are generated automatically, you can play with infinite number of Sudoku puzzles!

You can also play 4x4,6x6,7x7,8x8 ordinary number sudoku.

Sudoku Rules
Put all four 1,2,3,4 (or1,2,3,4,5,6,7) numbers in 4(or 6,7) vertical columns, 4(or 6,7) horizontal rows, 4(or 6,7) squares surrounded by bold lines.

Step into the world of numerical puzzles!