The idea for this activity has been on my mind for a while, so I was glad to finally pull it together this weekend. To complete the activity, O turns the dial on the side of the toothpick dispenser. Either a red or blue toothpick comes out, and she puts it in the appropriate toothpick holder. She LOVED this activity, and she did it at least 3 times in a row. I planned on also having yellow toothpicks, but I used tempera paint to paint the top of the yellow toothpick holder, and it immediately peeled right off. Another annoying thing is that the toothpicks are not uniform in size. Some go in easily, you have to put forth a little effort to get some of them in the holes, and others won't fit at all. I guess I should have tried each toothpick before introducing the work to O :( This will replace the plastic ice cube color sorting work on O's Montessori shelf. That work was too easy for her, and she was totally uninterested in it.