Note how this is built in the "stacked" method, i.e. old school Lego. Even with technical parts, this was uniquely accessible. My proudest achievement was a s

Note how this is built in the "stacked" method, i.e. old school Lego. Even with technical parts, this was uniquely accessible. My proudest achievement was a smooth running, jamproof pump for elevating marbles; you can see it from about 0:27 in this old camcorder video: https://youtu.be/Mw3dUbRfMSw?t=24 https://youtu.be/Mw3dUbRfMSw?t=24 These Legos encouraged engineering thinking all the way and were the defining toy of my childhood. Modern Legos are stunning. Look, for example, for the Rubik's cube solve machine that can twist a (lubricated) cube to completion in a few seconds. However they're no longer stacked from bottom to top; they're built "inside out" and the best tool to come up with a design for them is probably a CAD program. Stunning results for those who have put in the time, but not so encouraging for tinkerers just starting out. So it's nice to still see "old school" stuff being built.