My first car - 1974 Vega. Had a little accident and pushed in the front end. Told Dad "I can fix that". We (he) found some guy with Vega parts, and we ended up buying a front clip, cut through the fenders, loaded it complete into the trunk of his 74 Chrysler and brought it home. He opened the trunk helped me get it out, then said.. "There you go" and walked away :)
My mom still tells the story of when I was six and took apart my first watch. Never did that thing back running :)