Confession: Before I begin using the Montessori Method I used this shelf for various things. When the children would put things down the holes of the shelves, I would stop them by covering the holes. They would manage to uncover the hole and still keep putting things down the hole. A power struggle would take place and I would "win" by removing the shelf. Now I keep this shelf in our learning enviroment to look for readiness that Happy demonstrated. Isn't it a wonderful thing that if we can continue to be life long learners we can even learn things from how a particular way a shelf is made. Most important, if we are observers of the child we can follow the child and be able to understand what next step they are needing in their development.