Disney movie with invisibility formula?

Cafe Society
1

Friend and I were talking about this a week or so ago. We were driving, and somehow the subject turned to '60s and '70s Disney movies and their inevitable ten-minute chase scenes through downtown Bakersfield and six sound stages, plus someone on either water skis or a motorcycle in front of a blue screen.

Anyway. We were trying to remember the name of one such film that had to do with an invisibility formula. I guess it would be the same premise as Flubber: scientist invents something, teenagers promote it, and bad guys want to steal it. Couldn’t find out from IMDB, and I’m sorry to say I don’t know who might have been in it, although Disney did have a regular stable: Tommy Kirk and Dean Jones and like that.

Can anyone help? Thanks in advance!

2

Now You See Him, Now You Don’t (1972), starring Kurt Russell as Dexter Riley.

I finally got to one of these first.

3

You rock, Robot Arm! Thanks.

4

You’re welcome, Rilch. Three minutes, not bad.

5

There were three Dexter Riley movies - “The Computer Wore Tennis Shoes,” “Now You See Him, Now You Don’t,” and “The Strongest Man In The World”.

They were all set in the fictional Medfield College, which was also where “The Absent Minded Professor” and probably several other subsequent movies were set.

6

Thanks, Guano!

7

And Alonzo Hawk, the bad guy in “The Absent Minded Professor,” was also in “Herbie Rides Again.”

Anybody know any other connections?