I made this toy for Jambin this afternoon. He loved it! And it only cost about $2 for the box - everything else I already had in my pantry. I used brown rice and red lentils because they were what I found in the pantry, but I also liked the colour contrast.
Of course, the rice and lentils didn't always remain in the box, but Jambin had fun helping me pick up all the little bits that "fell" out.