froggy would appear and say, HI-DEE, HI-DE, HI-DEE! billie gilbert would appear as the prof. and give voice lessons.. something would happen ( maybe froggy would spray sneezing powder? ) and he would sneeze uncontrollably and leave.. also remember the magic twanger.. from my dim memory, i thought it was froggy's way of triggering a practical joke.. the scenes of the kids in the audience struck me as strange.. i remember that they always were doing the same exact movements, as if the same film was used every episode.. why not, what do kids know? there was a song andy sang with the audience.. only remember the ending-- good ol' andy's gang!