Sphero Scaling Wall

This design is a vertically oriented obstacle designed for the [Sphero mini](https://sphero.com/products/sphero-mini). In practice it is most often used as a stand-alone activity, but it was initially intended to be used as an obstacle in conjunction with the [Sphero Cardboard Maze Builder Improved](https://www.thingiverse.com/thing:7005754).

The Sphero is intended to start at the top of the obstacle, then drop down onto the individual balconies in succession to reach the bottom of the obstacle, where there are three "doorways" that the Sphero can then enter. The final part of the obstacle is that two of the doorways are blocked, meaning participants must navigate to and enter the correct doorway.

The distance the Sphero drops between balconies is specifically optimized to allow sufficient acceleration for the inbuilt accelerometer to register the stop, but not so far as to induce discrepancy in the Sphero's orientation or to cause the shell to open (both of which seem to occur more