DS2.5 is into auto mechanics lately. Today I built a model with a small and large gear and a flat arm out of cardboard and some nuts and bolts to show DS tangibly how rotary motion can be translated into reciprocating motion and vice versa.

When I asked him if he knew what the arm was, he said without hesitation, "It's a crankshaft." When I asked him how he knew that, he said, "Because I looked at it, thought about it, and figured it out." Um, yes. I actually didn't know the answer (I thought it was "drive shaft"), so I looked it up and saw that, as usual, DS was right.

It took a moment to sink in: my 2-year-old is teaching ME auto mechanics, apparently. I didn't see that coming. Talk about stuff you can't mention on the playground. I am going to be in over my head when he's older...

Last edited by aquinas; 05/13/14 04:47 AM. Reason: Precision
What is to give light must endure burning.