This can be a problem because LEGO axles have a “plus” shaped profile, and you may not want everything on that axle tilted as well — having a 90-degree solution makes a lot of sense.

Lego may want to think about adding a few more ... complete with a "running" drivetrain and a steerable front axle. This kit is labeled as a Technic build, but with a price of $59.99, it's not ...

Here’s a rather mesmerizing piece of Lego genius, displayed as a .GIF for ... between the ON and OFF states through a series of axle joints and bevel gears.