Oh well besides the usual tearing apart transistors/stereos and even my old BUSH TV... one of the memorable project i was involved was for this science competition in the 9th grade in school.
We made a Bascule bridge(the opening type bridges) we used the usual 3V/6V motors and used an alternating adapter and the bridge was held together with strings. and it opened and closed by itself( had even imagined using sensors but really didnt know how to make one back then.i remember even making a scaled replica of the TITANIC
to impress this girl i liked in school(titanic fever was on back then). And yes we won!!
although back then i didnt have a camera of my own and never got a chance to take pics of the same. what followed was even worse. some of the WWF crazy freaks took apart our whole creation.I felt so bad about it that years later when i got a chance to help out my cousin with her project i made the same thing with much better looks ( due to a good practice with model-making now frm my architecture course ) AND I simply like to adore it now and then minus the Titanic now...coz the one i was impressing is now my sweetheart ...