I remember posting a thread here a couple years ago about this "hydraulic plant" toy that I had when I was about 10 and no one could remember it. My son found it today after I mentioned it during dinner.
It was one of Kenner's "Girder and Panel" spin-offs of which I had many of, along with the usual Erector Set and Lincoln Logs...

It was one of Kenner's "Girder and Panel" spin-offs of which I had many of, along with the usual Erector Set and Lincoln Logs...