I wrote a limerick in third grade, when my regular teacher kicked me out of class and sent me to Mrs. Spencer's Workshop, where we got to do our own projects.
It wasn't a great limerick, and Mrs. Spencer had to help me with it:
There was a young lad from Dunn School
Over books with good looks he would drool
The books got so soggy,
They were fed to the doggie!
That poor young lad from Dunn School
After that unauspicious start, I went on to drawing maps of freeway interchanges. When I finished those, I decided I wanted to make a printed circuit board.
I figured I needed a kitchen cutting board (for the "board" part), a sheet of copper, some electrical tape to act as resist, nitric acid to etch away the unmasked parts of the copper, and a fish tank to hold the nitric acid.
So Mrs. Spencer got me all of those! I laid out the tape on both sides of the copper sheet and dunked it in the tank of nitric acid. We watched the copper dissolve into the acid, and there were the traces for my circuit board.
Of course we didn't need eye protection. We were all immortal and invulnerable in those days.
Yeh I know its not a limerick. I have seen a version of this as a true limerick in a book of 'science humor'. Looked for it but can't find. Every version online is this non-limerick version, presented as a limerick. I will update if I find the original.
From the limericks page:
Three jolly sailors from Blaydon-on-Tyne
They went to sea in a bottle by Klein.
Since the sea was entirely inside the hull
The scenery seen was exceedingly dull.