Play Phit, a Blokus/Tetris-style game: is great for kids and those who never played Tetris before. It allows you to develop logical thinking and helps you to understand how to fit all the pieces located at the top and make them fir into the yellow marked area.
How to play: You have to slide Blokus- or Tetris-style pieces (block shapes) around (while holding them with your left mouse button), and try to fit them all into the yellow area at the bottom. If you get them with spaces, you’ll have to move them around again. You can drag a few pieces at once in any direction, as long as you have free space to move them to (but you cannot rotate the pieces). Simply click on a piece with your mouse and move the piece while holding the left button. Once you play the game, it is very clear how to play, but to solve the puzzle needs a lot of thought and patience!