For me, it's the A Team intro. When I was younger, maybe Hong Kong Phooey (number 1 super guy!). Or Rainbow. Or maybe the Pink Panther cartoon series (the one and only, truly original). Or maybe Top Cat.
Oh no, wait, I've got it. The Banana Splits. I can't remember anything about the program itself, but I remember the insanely cheerful theme tune. Tra la la, tra lala la, tra la la, tra lalala! Maybe not the best theme tune, but very memorable.
Or maybe Bagpuss. When Bagpuss wakes up, all his friends wake up.
Trumpton. Or was it Camberwick Green? They were related series and have splodged together in my memory. Hugh, Hugh, Barney McGrew, Cuthbert, Dibble and Grub. IIRC. And this is the clock that tells the time in Trumpton!
EDIT: One from a little later:
To be accompanied by pretending to paddle one of those big Hawaiian canoe boats.