The Bus

This CAD model was designed by Oskar van Deventer, copyright (c), 15 August 2026

The Bus is an invention by Sjaak Griffioen. The goal is to drive the school bus from the depot to the school, while picking up children on its way. Children can only enter from the right side of the bus. Moreover, the bus can only ride forward. It cannot back up. A set of tiles is provided to make a road grid. The children are waiting at some of the bus stops. The tiles are designed such that one cannot go around at the same tile, one always needs to move to the next. 

A solution can be provided in the form "AKFHGIJKGHONB", which unequivocally describes the route to pick up all children. The bus has a counter that counts the number of tiles passed. Each challenge has a maximum number. If the bus exceeds that number, then the solution is not optimal ("bus out of gas", "children too late"), and one needs to find a better route. The hardest challenges can be very difficult, with multiple loops, and passing the same tiles multiple times.

Note that challenges are not provided with the Print-It-Yourself. So this puzzle is also a Design-Challenges-Yourself".

Here are some links about this design.
https://www.youtube.com/watch?v=_x4xN0nmAPc

Feel free to 3D-print an extra sample to give to a friend, as long as you mention the designer and don't charge money.

If you are planning to sell some samples, then please contact me for a license agreement. The royalty fee is 10% of your selling price.

Please do not upload the design to a commercial service, or redistribute the design in any way other than linking to the YouTube video: https://www.youtube.com/watch?v=_x4xN0nmAPc

Enjoy!

Oskar
19 August 2026

Contact: 
https://oskarvandeventer.nl/index_contact.php?subject=Print%20It%20Yourself


