2- Cardboard Tetris Tetris, one of the most common digital games in history, is a very valuable game for both the development of visual perception and the development of cognitive intelligence. So, how about playing this game on a platform where you can create it in real life? Here is our recipe: Ingredients: Cardboard Colored foam sheet Colored craft papers Glue Ruler Scissors Pen Recipe: Divide the cardboard into squares measuring 10x10 mm, as in the photo. The measurements of these squares will also be the measurements of the tetris pieces. You can use colored foams to raise the tetrisine frame and parts. If you want, you can also glue the cartons to the top milk to add dimension to the tetris pieces.