Now theres an idea.
Where do i buy that from ? Is it the same store that sells long weights and sky hooks?
Yes - same place - be careful to not shake the tin on the way home
little story
Where I used to teach - and was a trainee for 2 terms before that - there was a very nice but "very low ability" boy
he was fine but needed to be busy
but anything complicated just frustrated him
so he ws sometime sent to take a message to one of the otehr D&T teachers
I was told that if he came round with a piece of paper then I should read it - but it might be blank
then send him back with another "message"
anyway - one day his teacher was talking to the others about something complicated and wanted this boy out of the way
so he sent him to another D&T teacher for a "tin of tartan paint"
that teacher knew the code and sent him to the D&T technician - who was on the other side of the block of classrooms
the boy was happy to be useful and was given a tin of paint
he happily went back to his teacher
who opened it and told him he MUST have shaken it on the way back because it was all mixed up
so the lad sent back and told the technician
who gave him another tin - and told him to walk back VERY carefully
which he did
by the time the lad got back to his classroom the teacher had sorted the rest of the class out and all was well
[end story]