I have been biking around Hiroshima, Japan and have seen cubes in the playground equipment in various areas throughout the city. The jungle gym stations are designed like a maze on the inside by strategically having bars missing in the cubes so kids can climb through. I wonder how this impacts their understanding of construction and 3D geometry?
![](https://riskemath.wordpress.com/wp-content/uploads/2016/09/img_1893.jpg?w=900)