The first view is from one end of the larger, blue sensory table.
Duct tape is spread over the edges. Three cuts are made in the tape to be able to fold the tape over the lip of the coffee can.
The third view shows a set of Boxes in Boxes in a second, smaller sensory table right next to the blue table. This set is made from five boxes. The set includes an interesting component: a cantilevered box extending out from the middle of the other boxes.
#4 under Dimensions and Elements highlights creating spaces over, under, around, and through the table for exploration. Axiom #2 states that children will explore any and all spaces created by the apparatus. Let's see what that means for the Boxes in Boxes apparatus.
"Around" cannot be illustrated with one picture. It is best to think of "around" as the children moving around the apparatus appraising the spaces in terms of suitability for their operations. Watch.
If you are interested in a similar apparatus, check out this post and this post. The apparatus featured in those posts are larger and much more closed.
The corollary to Axiom #2 asserts: the more spaces, the more exploration. I will leave it to your imagination how much exploration eleven boxes with multiple holes and openings on multiple levels provokes.