Daiso sells these blank grid exercise books for practicing writing kana or kanji for nice and cheap. If you look carefully at the cover you can see the grid patterns. The red one has a column that is useful for writing the furigana reading and is bigger do better for learning to write complex kanji for the first time. The blue one the grids are a little smaller. There's lots of different grid sizes and styles.
Just thought there would be others as excited as I to see this!
by starlight_conquest