Scooby Doo would be a great theme like 1969 mentioned. Excellent idea.

When i was a kid, they had a japaneese cartoon caled G-Force, does anyoine remember that. It would make a good pin. Sometimes i think the Phoenix 1978 Pinny had some of that show n colours thrown into it. ?

Yeah mate I remember G-Force, it is GATCHAMAN redubbed and edited for the american audience after sandy frank bought it trying to cash in on the populatrity of Star Wars at the time.
I have a few seasons of GATCHAMAN on dvd...much more violent than the editied G-FORCE. The animation is a bit weak by todays standards but on a whole the show stands up very well.