For a generation, Take Hart gave rise to three things: Morph, The Gallery, and an overwhelming urge to smudge anything you'd drawn using chalk, charcoal or soft pencil with your thumb in an attempt to get the nice blending effect Tony made look so easy.
Morph, of course, was an icon, even though he was clearly an idiot. And presumably Tony never tried to explain the existence of "the little clay man who lived in a box on his desk" to any close family, otherwise they'd have had him locked up.
The Gallery was responsible for more parent's work being shown on screen than any other programme, Dad's crayola tribute to impressionism standing out a mile alongside little Sarah's "Still life of owl, in pasta, sand and glue".
The janitor however was rubbish.