Enclosures with holes offer children the opportunity to nourish and sharpen their developing sense of proprioception. To that end, I offer an apparatus from a few years back that I call: cardboard divider. The apparatus partitions the sensory table into seven alcoves. Alcoves 1, 2, 3, 5, 6, and 7 are triangles. Alcove 4 is a square. The children physically occupy the triangle alcoves. However, the only way children access alcove 4 is through windows.
In an article in TheScientist: Exploring Life, Inspiring Innovation entitled Proprioception: The Sense Within, the authors write that proprioception "... not only enables us to control the movements we make, but provides us with our sense of self, the awareness of our body and its movements as we navigate through our surroundings."
Proprioception is extremely important. Can you imagine what a nightmare it would be if we had to take our eyes off the road to look for the brake pedal every time we needed to slow down or stop the car! Children unconsciously work on their sense of proprioception as they interact with their environment. I contend that we can help children develop and sharpen their sense of proprioception by offering children interesting and intriguing spaces in which they can challenge what their body can do.