We had two non-functioning CD players hanging around. Before throwing them away, Polly and Jack decided to explore them. Out came some of Daddy's small tools and the magnifying glasses. I didn't note the time, but they probably spent more than an hour taking those players apart and marveling over the tiny pieces that were inside.
They compared the two and found the similar parts and noticed the differences.
Should I count this as "mechanical engineering" or "de-construction skills"?