In the 1960s, I played with a plastic moulded toy that resembled a snake (think it comprised of hexagonal shapes) all linked together in a chain which could then be made into different shapes. The colours were bright plain plastic blocks such as yellow, blue green and red I think. It is not the rubiks's snake or twist. Any ideas?

Thank you

Fisher Price snap-lock beads, maybe?

Brilliant Basics Snap-Lock Beads - Shapes - Fisher Price Toys - Brilliant Basics

Did you ever find where to get the "snake" chain snap together toy you asked about? It sounds like the one I'm looking for too!