Did it work ? yes,but no,but yes.

Did it work ?

Well yes: the tomatoes produced enough electricity to make a little toy 'sing'.
Well not exactly:  It was verrry quied and verry slow. (and only lasted for 2 day's)

What happend?
I think that it did not work optimaal for two main reasons:
1) There was a lot of electricity los due to the way the thin copper wires where connected to the galvenised nail and the copper nail. There was a lot of twisting, turning, touching.
2) I probabely made a mistakes in the connection somewhere.


Now that i know this, i could try it again and avoid these mistakes. 
Right ;-)