Cool idea for sentimental shirts. I can't believe I never thought of this.
Mr Benn - loved it!
Wade Whimsies - I collected loads of these when I was little!
Fingerbobs - there were only 13 episodes made, dating back to 1972. Here is Fingermouse, Scampi, and Yoffy played by Rick Jones.
The Clangers: their hollow planet was also inhabited by the Soup Dragon. Photograph: Channel 4
IVY L. WALLACE ''POOKIE IN WONDERLAND'', 1963 | eBay