My boys (3 &amp; 5) love wrenching on old lawnmower engines.  The trick is not to find something for them to work on, it&#x27;s leading by example.<p>They will do what they see you doing, up to a certain age.<p>I have a sheet of paper from daycare, pride of place in my office, that reads &quot;What do you want to learn this year? I want to learn about making projects&quot;<p>It never fails to warm my heart